I found this website advertised on my local vets website (don't know if it been posted on here before), but thought it may be useful to other members. The website is
Home | Vet Help Direct and it's a UK website, you can enter postcode or county and select small animals, and it will find vets local to you and you can read reviews about vet in your area. You may need to contact the vets to see if the treat hamsters though. As after everything I've been through with Sherbet accident, it handy to have a local vet number to contact in an emergency (I already knew about my vets before). So it maybe useful if you don't know if you have a vet nearby to you who will treat hamsters.
This website also has a symptom checker, to see whether your hamster symptoms will need vet treatment (doesn't give indication of specific health problems and the response given is similar for different symptoms) so would recommend asking on here if you have any concerns with your hamster health or to seek vet advice.
I hope this will help if you are looking for a vet in your area.