# SG4 8: postcode sector in North Hertfordshire 281 live postcodes: 277 in North Hertfordshire, 3 in Stevenage and 1 in Welwyn Hatfield. A postcode has no figures of its own: each layer is published for whole councils, neighbourhoods or exact points. The figures below are for the whole of North Hertfordshire, which holds 99% of SG4 8’s postcodes. Open the map at SG4 8 for neighbourhoods and points. In: [North Hertfordshire](https://openindex.co.uk/north-hertfordshire) › [SG4](https://openindex.co.uk/postcode/sg4) ## Key figures - **Average house price: £422,835** (August 2026). North Hertfordshire’s average house price was £422,835 in August 2026 (HM Land Registry). Up 3.1% in a year. Source: UK House Price Index, August 2026. Published 21 October 2026. - **Median full-time pay: £49,224** (2025). Full-time workers living in North Hertfordshire earned a median of £49,224 in 2025 (ONS earnings survey). 18th highest paid of 348. Source: Annual Survey of Hours and Earnings, 2025. Published 23 October 2025. - **House price to pay: 8.6×** (2025). A home in North Hertfordshire costs 8.6 times local full-time pay. Joint 101st least affordable of 348. Source: Worked out by Open Index from the UK House Price Index and the ONS earnings survey. Published 21 October 2026. - **Deprivation score: 11.3** (2025). North Hertfordshire has a deprivation score of 11.3 in the English Indices of Deprivation 2025 (MHCLG). 38th least deprived of 296. Source: English Indices of Deprivation 2025, 2025. Published 30 October 2025. ## About - Type: Postcode sector - Live postcodes: 281 - Councils: [North Hertfordshire](https://openindex.co.uk/north-hertfordshire) - : [Stevenage](https://openindex.co.uk/stevenage) - : [Welwyn Hatfield](https://openindex.co.uk/welwyn-hatfield) - Centre: 51.8658, -0.2761 Council: [North Hertfordshire](https://openindex.co.uk/north-hertfordshire) (District, 99%). ## Councils - [North Hertfordshire](https://openindex.co.uk/north-hertfordshire): 277 postcodes - [Stevenage](https://openindex.co.uk/stevenage): 3 postcodes - [Welwyn Hatfield](https://openindex.co.uk/welwyn-hatfield): 1 postcodes ## Your MP - [Hitchin](https://openindex.co.uk/constituency/hitchin): Alistair Strathern (Labour), MP since July 2024. 62% of the people here. - [Stevenage](https://openindex.co.uk/constituency/stevenage): Kevin Bonavia (Labour), MP since July 2024. 38% of the people here. - [Welwyn Hatfield](https://openindex.co.uk/constituency/welwyn-hatfield): Andrew Lewin (Labour), MP since July 2024. 0.4% of the people here. As of 18 October 2026. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. Source: UK Parliament, Members API. ## Postcodes in SG4 8 [SG4 8AB](https://openindex.co.uk/postcode/sg4-8ab), [SG4 8AD](https://openindex.co.uk/postcode/sg4-8ad), [SG4 8AE](https://openindex.co.uk/postcode/sg4-8ae), [SG4 8AF](https://openindex.co.uk/postcode/sg4-8af), [SG4 8AG](https://openindex.co.uk/postcode/sg4-8ag), [SG4 8AH](https://openindex.co.uk/postcode/sg4-8ah), [SG4 8AJ](https://openindex.co.uk/postcode/sg4-8aj), [SG4 8AL](https://openindex.co.uk/postcode/sg4-8al), [SG4 8AN](https://openindex.co.uk/postcode/sg4-8an), [SG4 8AP](https://openindex.co.uk/postcode/sg4-8ap), [SG4 8AQ](https://openindex.co.uk/postcode/sg4-8aq), [SG4 8AR](https://openindex.co.uk/postcode/sg4-8ar), [SG4 8AS](https://openindex.co.uk/postcode/sg4-8as), [SG4 8AT](https://openindex.co.uk/postcode/sg4-8at), [SG4 8AU](https://openindex.co.uk/postcode/sg4-8au), [SG4 8AW](https://openindex.co.uk/postcode/sg4-8aw), [SG4 8AX](https://openindex.co.uk/postcode/sg4-8ax), [SG4 8AZ](https://openindex.co.uk/postcode/sg4-8az), [SG4 8BA](https://openindex.co.uk/postcode/sg4-8ba), [SG4 8BB](https://openindex.co.uk/postcode/sg4-8bb), [SG4 8BE](https://openindex.co.uk/postcode/sg4-8be), [SG4 8BG](https://openindex.co.uk/postcode/sg4-8bg), [SG4 8BJ](https://openindex.co.uk/postcode/sg4-8bj), [SG4 8BL](https://openindex.co.uk/postcode/sg4-8bl), [SG4 8BN](https://openindex.co.uk/postcode/sg4-8bn), [SG4 8BP](https://openindex.co.uk/postcode/sg4-8bp), [SG4 8BQ](https://openindex.co.uk/postcode/sg4-8bq), [SG4 8BS](https://openindex.co.uk/postcode/sg4-8bs), [SG4 8BT](https://openindex.co.uk/postcode/sg4-8bt), [SG4 8BU](https://openindex.co.uk/postcode/sg4-8bu), [SG4 8BW](https://openindex.co.uk/postcode/sg4-8bw), [SG4 8BX](https://openindex.co.uk/postcode/sg4-8bx), [SG4 8BZ](https://openindex.co.uk/postcode/sg4-8bz), [SG4 8DA](https://openindex.co.uk/postcode/sg4-8da), [SG4 8DB](https://openindex.co.uk/postcode/sg4-8db), [SG4 8DD](https://openindex.co.uk/postcode/sg4-8dd), [SG4 8DE](https://openindex.co.uk/postcode/sg4-8de), [SG4 8DF](https://openindex.co.uk/postcode/sg4-8df), [SG4 8DG](https://openindex.co.uk/postcode/sg4-8dg), [SG4 8DH](https://openindex.co.uk/postcode/sg4-8dh), [SG4 8DJ](https://openindex.co.uk/postcode/sg4-8dj), [SG4 8DL](https://openindex.co.uk/postcode/sg4-8dl), [SG4 8DN](https://openindex.co.uk/postcode/sg4-8dn), [SG4 8DQ](https://openindex.co.uk/postcode/sg4-8dq), [SG4 8DR](https://openindex.co.uk/postcode/sg4-8dr), [SG4 8DS](https://openindex.co.uk/postcode/sg4-8ds), [SG4 8DU](https://openindex.co.uk/postcode/sg4-8du), [SG4 8DW](https://openindex.co.uk/postcode/sg4-8dw), [SG4 8DX](https://openindex.co.uk/postcode/sg4-8dx), [SG4 8DY](https://openindex.co.uk/postcode/sg4-8dy), [SG4 8DZ](https://openindex.co.uk/postcode/sg4-8dz), [SG4 8EB](https://openindex.co.uk/postcode/sg4-8eb), [SG4 8EE](https://openindex.co.uk/postcode/sg4-8ee), [SG4 8EF](https://openindex.co.uk/postcode/sg4-8ef), [SG4 8EG](https://openindex.co.uk/postcode/sg4-8eg), [SG4 8EH](https://openindex.co.uk/postcode/sg4-8eh), [SG4 8EJ](https://openindex.co.uk/postcode/sg4-8ej), [SG4 8EL](https://openindex.co.uk/postcode/sg4-8el), [SG4 8EN](https://openindex.co.uk/postcode/sg4-8en), [SG4 8EP](https://openindex.co.uk/postcode/sg4-8ep), [SG4 8EQ](https://openindex.co.uk/postcode/sg4-8eq), [SG4 8ER](https://openindex.co.uk/postcode/sg4-8er), [SG4 8ES](https://openindex.co.uk/postcode/sg4-8es), [SG4 8ET](https://openindex.co.uk/postcode/sg4-8et), [SG4 8EU](https://openindex.co.uk/postcode/sg4-8eu), [SG4 8EW](https://openindex.co.uk/postcode/sg4-8ew), [SG4 8EX](https://openindex.co.uk/postcode/sg4-8ex), [SG4 8EY](https://openindex.co.uk/postcode/sg4-8ey), [SG4 8EZ](https://openindex.co.uk/postcode/sg4-8ez), [SG4 8FG](https://openindex.co.uk/postcode/sg4-8fg), [SG4 8FN](https://openindex.co.uk/postcode/sg4-8fn), [SG4 8FS](https://openindex.co.uk/postcode/sg4-8fs), [SG4 8GG](https://openindex.co.uk/postcode/sg4-8gg), [SG4 8HA](https://openindex.co.uk/postcode/sg4-8ha), [SG4 8HB](https://openindex.co.uk/postcode/sg4-8hb), [SG4 8HD](https://openindex.co.uk/postcode/sg4-8hd), [SG4 8HE](https://openindex.co.uk/postcode/sg4-8he), [SG4 8HF](https://openindex.co.uk/postcode/sg4-8hf), [SG4 8HG](https://openindex.co.uk/postcode/sg4-8hg), [SG4 8HH](https://openindex.co.uk/postcode/sg4-8hh), [SG4 8HJ](https://openindex.co.uk/postcode/sg4-8hj), [SG4 8HL](https://openindex.co.uk/postcode/sg4-8hl), [SG4 8HN](https://openindex.co.uk/postcode/sg4-8hn), [SG4 8HP](https://openindex.co.uk/postcode/sg4-8hp), [SG4 8HR](https://openindex.co.uk/postcode/sg4-8hr), [SG4 8HS](https://openindex.co.uk/postcode/sg4-8hs), [SG4 8HT](https://openindex.co.uk/postcode/sg4-8ht), [SG4 8HU](https://openindex.co.uk/postcode/sg4-8hu), [SG4 8HX](https://openindex.co.uk/postcode/sg4-8hx), [SG4 8HY](https://openindex.co.uk/postcode/sg4-8hy), [SG4 8HZ](https://openindex.co.uk/postcode/sg4-8hz), [SG4 8JA](https://openindex.co.uk/postcode/sg4-8ja), [SG4 8JB](https://openindex.co.uk/postcode/sg4-8jb), [SG4 8JD](https://openindex.co.uk/postcode/sg4-8jd), [SG4 8JE](https://openindex.co.uk/postcode/sg4-8je), [SG4 8JG](https://openindex.co.uk/postcode/sg4-8jg), [SG4 8JH](https://openindex.co.uk/postcode/sg4-8jh), [SG4 8JJ](https://openindex.co.uk/postcode/sg4-8jj), [SG4 8JN](https://openindex.co.uk/postcode/sg4-8jn), [SG4 8JP](https://openindex.co.uk/postcode/sg4-8jp), [SG4 8JQ](https://openindex.co.uk/postcode/sg4-8jq), [SG4 8JS](https://openindex.co.uk/postcode/sg4-8js), [SG4 8JT](https://openindex.co.uk/postcode/sg4-8jt), [SG4 8JU](https://openindex.co.uk/postcode/sg4-8ju), [SG4 8JX](https://openindex.co.uk/postcode/sg4-8jx), [SG4 8JY](https://openindex.co.uk/postcode/sg4-8jy), [SG4 8JZ](https://openindex.co.uk/postcode/sg4-8jz), [SG4 8LA](https://openindex.co.uk/postcode/sg4-8la), [SG4 8LB](https://openindex.co.uk/postcode/sg4-8lb), [SG4 8LD](https://openindex.co.uk/postcode/sg4-8ld), [SG4 8LE](https://openindex.co.uk/postcode/sg4-8le), [SG4 8LF](https://openindex.co.uk/postcode/sg4-8lf), [SG4 8LG](https://openindex.co.uk/postcode/sg4-8lg), [SG4 8LH](https://openindex.co.uk/postcode/sg4-8lh), [SG4 8LJ](https://openindex.co.uk/postcode/sg4-8lj), [SG4 8LL](https://openindex.co.uk/postcode/sg4-8ll), [SG4 8LN](https://openindex.co.uk/postcode/sg4-8ln), [SG4 8LP](https://openindex.co.uk/postcode/sg4-8lp), [SG4 8LR](https://openindex.co.uk/postcode/sg4-8lr), [SG4 8LS](https://openindex.co.uk/postcode/sg4-8ls), [SG4 8LT](https://openindex.co.uk/postcode/sg4-8lt), [SG4 8LU](https://openindex.co.uk/postcode/sg4-8lu), [SG4 8LW](https://openindex.co.uk/postcode/sg4-8lw), [SG4 8LX](https://openindex.co.uk/postcode/sg4-8lx), [SG4 8LY](https://openindex.co.uk/postcode/sg4-8ly), [SG4 8NE](https://openindex.co.uk/postcode/sg4-8ne), [SG4 8NG](https://openindex.co.uk/postcode/sg4-8ng), [SG4 8NH](https://openindex.co.uk/postcode/sg4-8nh), [SG4 8NJ](https://openindex.co.uk/postcode/sg4-8nj), [SG4 8NL](https://openindex.co.uk/postcode/sg4-8nl), [SG4 8NN](https://openindex.co.uk/postcode/sg4-8nn), [SG4 8NP](https://openindex.co.uk/postcode/sg4-8np), [SG4 8NQ](https://openindex.co.uk/postcode/sg4-8nq), [SG4 8NR](https://openindex.co.uk/postcode/sg4-8nr), [SG4 8NS](https://openindex.co.uk/postcode/sg4-8ns), [SG4 8NT](https://openindex.co.uk/postcode/sg4-8nt), [SG4 8NU](https://openindex.co.uk/postcode/sg4-8nu), [SG4 8NW](https://openindex.co.uk/postcode/sg4-8nw), [SG4 8NX](https://openindex.co.uk/postcode/sg4-8nx), [SG4 8NY](https://openindex.co.uk/postcode/sg4-8ny), [SG4 8NZ](https://openindex.co.uk/postcode/sg4-8nz), [SG4 8PA](https://openindex.co.uk/postcode/sg4-8pa), [SG4 8PB](https://openindex.co.uk/postcode/sg4-8pb), [SG4 8PD](https://openindex.co.uk/postcode/sg4-8pd), [SG4 8PE](https://openindex.co.uk/postcode/sg4-8pe), [SG4 8PF](https://openindex.co.uk/postcode/sg4-8pf), [SG4 8PG](https://openindex.co.uk/postcode/sg4-8pg), [SG4 8PH](https://openindex.co.uk/postcode/sg4-8ph), [SG4 8PJ](https://openindex.co.uk/postcode/sg4-8pj), [SG4 8PL](https://openindex.co.uk/postcode/sg4-8pl), [SG4 8PN](https://openindex.co.uk/postcode/sg4-8pn), [SG4 8PP](https://openindex.co.uk/postcode/sg4-8pp), [SG4 8PR](https://openindex.co.uk/postcode/sg4-8pr), [SG4 8PT](https://openindex.co.uk/postcode/sg4-8pt), [SG4 8PU](https://openindex.co.uk/postcode/sg4-8pu), [SG4 8PW](https://openindex.co.uk/postcode/sg4-8pw), [SG4 8PY](https://openindex.co.uk/postcode/sg4-8py), [SG4 8PZ](https://openindex.co.uk/postcode/sg4-8pz), [SG4 8QA](https://openindex.co.uk/postcode/sg4-8qa), [SG4 8QB](https://openindex.co.uk/postcode/sg4-8qb), [SG4 8QD](https://openindex.co.uk/postcode/sg4-8qd), [SG4 8QE](https://openindex.co.uk/postcode/sg4-8qe), [SG4 8QG](https://openindex.co.uk/postcode/sg4-8qg), [SG4 8QH](https://openindex.co.uk/postcode/sg4-8qh), [SG4 8QJ](https://openindex.co.uk/postcode/sg4-8qj), [SG4 8QL](https://openindex.co.uk/postcode/sg4-8ql), [SG4 8QN](https://openindex.co.uk/postcode/sg4-8qn), [SG4 8QP](https://openindex.co.uk/postcode/sg4-8qp), [SG4 8QQ](https://openindex.co.uk/postcode/sg4-8qq), [SG4 8QR](https://openindex.co.uk/postcode/sg4-8qr), [SG4 8QS](https://openindex.co.uk/postcode/sg4-8qs), [SG4 8QT](https://openindex.co.uk/postcode/sg4-8qt), [SG4 8QU](https://openindex.co.uk/postcode/sg4-8qu), [SG4 8QW](https://openindex.co.uk/postcode/sg4-8qw), [SG4 8RA](https://openindex.co.uk/postcode/sg4-8ra), [SG4 8RB](https://openindex.co.uk/postcode/sg4-8rb), [SG4 8RD](https://openindex.co.uk/postcode/sg4-8rd), [SG4 8RF](https://openindex.co.uk/postcode/sg4-8rf), [SG4 8RG](https://openindex.co.uk/postcode/sg4-8rg), [SG4 8RH](https://openindex.co.uk/postcode/sg4-8rh), [SG4 8RJ](https://openindex.co.uk/postcode/sg4-8rj), [SG4 8RN](https://openindex.co.uk/postcode/sg4-8rn), [SG4 8RP](https://openindex.co.uk/postcode/sg4-8rp), [SG4 8RR](https://openindex.co.uk/postcode/sg4-8rr), [SG4 8RS](https://openindex.co.uk/postcode/sg4-8rs), [SG4 8RT](https://openindex.co.uk/postcode/sg4-8rt), [SG4 8RU](https://openindex.co.uk/postcode/sg4-8ru), [SG4 8RX](https://openindex.co.uk/postcode/sg4-8rx), [SG4 8RZ](https://openindex.co.uk/postcode/sg4-8rz), [SG4 8SA](https://openindex.co.uk/postcode/sg4-8sa), [SG4 8SB](https://openindex.co.uk/postcode/sg4-8sb), [SG4 8SD](https://openindex.co.uk/postcode/sg4-8sd), [SG4 8SE](https://openindex.co.uk/postcode/sg4-8se), [SG4 8SF](https://openindex.co.uk/postcode/sg4-8sf), [SG4 8SL](https://openindex.co.uk/postcode/sg4-8sl), [SG4 8SN](https://openindex.co.uk/postcode/sg4-8sn), [SG4 8SP](https://openindex.co.uk/postcode/sg4-8sp), [SG4 8SR](https://openindex.co.uk/postcode/sg4-8sr), [SG4 8ST](https://openindex.co.uk/postcode/sg4-8st), [SG4 8SU](https://openindex.co.uk/postcode/sg4-8su), [SG4 8SW](https://openindex.co.uk/postcode/sg4-8sw), [SG4 8SX](https://openindex.co.uk/postcode/sg4-8sx), [SG4 8SY](https://openindex.co.uk/postcode/sg4-8sy), [SG4 8SZ](https://openindex.co.uk/postcode/sg4-8sz), [SG4 8TA](https://openindex.co.uk/postcode/sg4-8ta), [SG4 8TB](https://openindex.co.uk/postcode/sg4-8tb), [SG4 8TD](https://openindex.co.uk/postcode/sg4-8td), [SG4 8TF](https://openindex.co.uk/postcode/sg4-8tf), [SG4 8TG](https://openindex.co.uk/postcode/sg4-8tg), [SG4 8TH](https://openindex.co.uk/postcode/sg4-8th), [SG4 8TJ](https://openindex.co.uk/postcode/sg4-8tj), [SG4 8TP](https://openindex.co.uk/postcode/sg4-8tp), [SG4 8TQ](https://openindex.co.uk/postcode/sg4-8tq), [SG4 8TR](https://openindex.co.uk/postcode/sg4-8tr), [SG4 8TS](https://openindex.co.uk/postcode/sg4-8ts), [SG4 8TY](https://openindex.co.uk/postcode/sg4-8ty), [SG4 8UA](https://openindex.co.uk/postcode/sg4-8ua), [SG4 8UB](https://openindex.co.uk/postcode/sg4-8ub), [SG4 8UD](https://openindex.co.uk/postcode/sg4-8ud), [SG4 8UE](https://openindex.co.uk/postcode/sg4-8ue), [SG4 8UF](https://openindex.co.uk/postcode/sg4-8uf), [SG4 8UG](https://openindex.co.uk/postcode/sg4-8ug), [SG4 8UH](https://openindex.co.uk/postcode/sg4-8uh), [SG4 8UJ](https://openindex.co.uk/postcode/sg4-8uj), [SG4 8UL](https://openindex.co.uk/postcode/sg4-8ul), [SG4 8UN](https://openindex.co.uk/postcode/sg4-8un), [SG4 8UP](https://openindex.co.uk/postcode/sg4-8up), [SG4 8UQ](https://openindex.co.uk/postcode/sg4-8uq), [SG4 8UR](https://openindex.co.uk/postcode/sg4-8ur), [SG4 8US](https://openindex.co.uk/postcode/sg4-8us), [SG4 8UT](https://openindex.co.uk/postcode/sg4-8ut), [SG4 8UU](https://openindex.co.uk/postcode/sg4-8uu), [SG4 8UW](https://openindex.co.uk/postcode/sg4-8uw), [SG4 8UX](https://openindex.co.uk/postcode/sg4-8ux), [SG4 8UY](https://openindex.co.uk/postcode/sg4-8uy), [SG4 8UZ](https://openindex.co.uk/postcode/sg4-8uz), [SG4 8WH](https://openindex.co.uk/postcode/sg4-8wh), [SG4 8WJ](https://openindex.co.uk/postcode/sg4-8wj), [SG4 8WP](https://openindex.co.uk/postcode/sg4-8wp), [SG4 8WT](https://openindex.co.uk/postcode/sg4-8wt), [SG4 8WW](https://openindex.co.uk/postcode/sg4-8ww), [SG4 8XA](https://openindex.co.uk/postcode/sg4-8xa), [SG4 8XB](https://openindex.co.uk/postcode/sg4-8xb), [SG4 8XD](https://openindex.co.uk/postcode/sg4-8xd), [SG4 8XE](https://openindex.co.uk/postcode/sg4-8xe), [SG4 8XF](https://openindex.co.uk/postcode/sg4-8xf), [SG4 8XG](https://openindex.co.uk/postcode/sg4-8xg), [SG4 8XH](https://openindex.co.uk/postcode/sg4-8xh), [SG4 8XJ](https://openindex.co.uk/postcode/sg4-8xj), [SG4 8XL](https://openindex.co.uk/postcode/sg4-8xl), [SG4 8XN](https://openindex.co.uk/postcode/sg4-8xn), [SG4 8XP](https://openindex.co.uk/postcode/sg4-8xp), [SG4 8XQ](https://openindex.co.uk/postcode/sg4-8xq), [SG4 8XR](https://openindex.co.uk/postcode/sg4-8xr), [SG4 8XS](https://openindex.co.uk/postcode/sg4-8xs), [SG4 8XT](https://openindex.co.uk/postcode/sg4-8xt), [SG4 8XU](https://openindex.co.uk/postcode/sg4-8xu), [SG4 8XW](https://openindex.co.uk/postcode/sg4-8xw), [SG4 8XX](https://openindex.co.uk/postcode/sg4-8xx), [SG4 8XY](https://openindex.co.uk/postcode/sg4-8xy), [SG4 8XZ](https://openindex.co.uk/postcode/sg4-8xz), [SG4 8YA](https://openindex.co.uk/postcode/sg4-8ya), [SG4 8YB](https://openindex.co.uk/postcode/sg4-8yb), [SG4 8YD](https://openindex.co.uk/postcode/sg4-8yd), [SG4 8YE](https://openindex.co.uk/postcode/sg4-8ye), [SG4 8YF](https://openindex.co.uk/postcode/sg4-8yf), [SG4 8YG](https://openindex.co.uk/postcode/sg4-8yg), [SG4 8YH](https://openindex.co.uk/postcode/sg4-8yh), [SG4 8YJ](https://openindex.co.uk/postcode/sg4-8yj), [SG4 8YL](https://openindex.co.uk/postcode/sg4-8yl), [SG4 8YN](https://openindex.co.uk/postcode/sg4-8yn), [SG4 8YP](https://openindex.co.uk/postcode/sg4-8yp), [SG4 8YQ](https://openindex.co.uk/postcode/sg4-8yq), [SG4 8YR](https://openindex.co.uk/postcode/sg4-8yr), [SG4 8YS](https://openindex.co.uk/postcode/sg4-8ys), [SG4 8YT](https://openindex.co.uk/postcode/sg4-8yt), [SG4 8YU](https://openindex.co.uk/postcode/sg4-8yu), [SG4 8YW](https://openindex.co.uk/postcode/sg4-8yw), [SG4 8YX](https://openindex.co.uk/postcode/sg4-8yx), [SG4 8YY](https://openindex.co.uk/postcode/sg4-8yy), [SG4 8YZ](https://openindex.co.uk/postcode/sg4-8yz) ## How to cite Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/postcode/sg4-8. Open Index's own text and the figures it works out are licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source data keeps its publishers' licences, named with each figure. Give each figure's period and source with it. Snapshot 2026.10.11. The HTML page: https://openindex.co.uk/postcode/sg4-8