Hi Malc, not sure if there are any of these stores near Avonmouth, but they are in clifton, the mall, Patchway, broadmead, Yate and various others areas around Bristol.
Over tother' side, it is newport, Cardiff, Cymbran, Abergaveny, Barry and several other places both sides of the river, and several stores in the bigger towns and cities.
All outside once a week, in & out once a month and signage once a month too.
Might or might not be viable...time will tell.
Ian