One Uk based company that I've not seen mentioned in these pages is Rayco, a useful source of a wide range of chemicals.
I have used them in the past and found them quite helpful. Like you Dave, I have not used them for a couple of years but only because my photography of late has been sporadic due to hip problems. I believe the outlet is above a chemist shop and the owner is interested in photography, FWIW !!
I visit Rayco 2-3 times a year. I am within reasonable driving distance. The premises doubles up as a pharmacy which must support its core ( and most important) function of supplying raw photographic chemicals.
Always friendly and I have never been disappointed by a lack of stock. They stock everything to brew Pyrocat and TF3 my main developer and fix.