Here is a list of towns in the uk that begin with s , you can place your council or housing association exchange in the one where you live.

Ukhomeswap homepage is located here

saffron walden
salford
salisbury
saltash
saltburn-by-the-sea
saltcoats
sandbach
sandhurst
sandown
sandwich
sandy
sanquhar
sawbridgeworth
scarborough
scarinish
scunthorpe
seaford
seaham
seahouses
seaton
selby
selkirk
sevenoaks
shaftesbury
shawbost
sheffield
shepperton
sherborne
sheringham
shetland
shifnal
shipley
shrewsbury
sidcup
sidmouth
sittingbourne
skelmersdale
skipton
sleaford
slough
solihull
south croydon
south petherton
south queensferry
south wirral
southall
southam
southampton
southend-on-sea
southminster
southport
southsea
southwell
sowerby
spalding
st albans
st andrews
st asaph
st helens
st ives
st leonards-on-sea
stafford
staines
stamford
stanford-le-hope
stanmore
staustell
stirling
stockport
stocksfield
stockton-on-tees
stoke-on-trent
stone
stonehaven
stornoway
stourbridge
stourport-on-severn
stowmarket
stranraer
stratford-upon-avon
strathcarron
strathpeffer
street
stroud
sudbury
sunbury-on-thames
sunderland
surbiton
sutton
sutton coldfield
sutton-in-ashfield
swaffham
swanage
swanley
swansea
swindon