Bill,
Tool shops you can browse around are few and far between these days. Mostly the trade is mail order based with 3 major suppliers who advertise in the modelling press. None of which are near Oxford but Axminster tools in High Wycombe, just down the M40 would be worth a visit.
I see that Cromwell have a Banbury branch. These are an industrial supplier so you could at least browse the catalogue and then pick up what you want at their branch. Even with Machine Mart, who are not exactly top end suppliers, you are in a bit of a black hole shop wise.
30 years ago I would have directed you to Millhill supplies in Crowmarsh Gifford or Sarjents tools in Reading or Swindon – long gone now
.
Others may know better – I hope so.
Rod (If you drift over to the west country, the Tool shop in Colyton, Devon is well worth a detour)
Edited By Roderick Jenkins on 21/06/2015 22:22:43