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

Ukhomeswap homepage is located here

aberdare
aberdeen
aberdovey
abergavenny
abergele
abertillery
aberystwyth
abingdon
accrington
airdrie
alcester
aldeburgh
alderley edge
aldershot
alfreton
alness
alnwick
alresford
alston
alton
altrincham
ambleside
amersham
andover
anstruther
antrim
appleby-in-westmorland
arbroath
ardrossan
armagh
arthog
arundel
ascot
ashbourne
ashford
ashington
ashtead
ashton-under-lyne
attleborough
aviemore
axminster
aylesbury
ayr