Thanks for all the suggestions. Sources pointed to we

Asda.

Brio make some floral gardening gloves which can be bought in some shops
(for example in Bath).

"Keen Gardeners", http://www.keengardener.co.uk, sell both Stanley work
gloves (largish) and similar by Briers (labelled 4-7 but actually very
small!). These are more "work gloves" instead of gardening gloves (i.e.
tougher, less flexible) but ideal for those like me who have nettles,
brambles etc. to avoid!

Paul DS.