There used to be a few in Didcot during my early years.
Mr Miles at the top of Haydon Road did Airfix kits and railway items. He was also a proper corner shop, so it was a toss up between moondust or an Airfix kit.
Centre News did Hornby for a while, as did a shop on the Wantage Road. Got my Star Wars figures from there.
I remember Howes when they where in Oxford, alas only Railmatch paint and sound chips now.
Motor books at the Headington Roundabout, alas gone!
Osbournes in Abingdon have gone to Bideford, which is now our holiday destination!
My grandparents lived in Westbury, so there was Macy's, then Barnes then the Gas Cupboard before they moved. Bought many a kit and my Mamod steam roller from Mr Macy/Mr Barnes. Also Junior Fayre (I think) got my 3 1/2 inch Rocket and OO Rocket set from there. They used to have a club where they reserved an item and you paid your pocket money in until you matched the price.
Happy Days
Matt