| Code | Name | Region |
|---|---|---|
| GBSFL | Stotfold | HRT |
| GBSDG | Stourbridge | DUD |
| GBSPS | Stourport On Severn | WOR |
| GBSOR | Stourton | WIL |
| GBSYR | Stourton/leeds | LDS |
| GBSEL | Stow On The Wold | GLS |
| GBSBI | Stowbridge | NFK |
| GBSUQ | Stowe Bucks | BKM |
| GBSTW | Stowmarket | SFK |
| GBSTB | Strabane | STB |
| GBSDK | Stradbroke | SFK |
| GBSML | Stramshall | STS |
| GBSJL | Strangford | DOW |
| GBSTR | Stranraer | DGY |
| GBSTF | Stratford | NWM |
| GBSAV | Stratford-upon-avon | WAR |
| GBSKG | Stoke Gifford | SGC |
| GBSGO | Stoke Golding | LEC |
| GBSNE | Stoke Newington | HCK |
| GBSOT | Stoke On Trent | STS |
| GBSPG | Stoke Poges | BKM |
| GBTKR | Stoke Row | OXF |
| GBSSB | Stoke Saint Gregory | SOM |
| GBOKE | Stokeham | NTT |
| GBSKH | Stokenchurch | BKM |
| GBSSL | Stokesley | NYK |
| GBSKU | Stoke-sub-hambon | SOM |
| GBOMY | Stondon Massey | ESS |
| GBZDC | Stone | KEN |
| GBSTX | Stone | STS |
| GBS2T | Stone | WOR |
| GBSBQ | Stonebroom | DBY |
| GBSVN | Stonehaven | ABD |
| GBYVZ | Stonehouse | GLS |
| GBSTJ | Stoneleigh | WAR |
| GBSYA | Stoney Stanton | LEC |
| GBSHC | Stinchcombe | GLS |
| GBSCY | Stirchley | SHR |
| GBSIG | Stirling | STG |
| GBSBD | Stockbridge | HAM |
| GBSIP | Stocking Pelham | HRT |
| GBSCH | Stockinish | ELS |
| GBSAK | Stocklake | BKM |
| GBSLD | Stockland | |
| GBSTK | Stockport | SKP |
| GBSBG | Stocksbridge | SHF |
| GBSOC | Stocksfield | NBL |
| GBSCT | Stockton | HEF |
| GBSCK | Stockton | SHR |
| GBSTT | Stockton-on-tees | STT |