There's a lot of choice round here. Most yards use a combination of Mayes and scrine or/and shotter and Byers as their vets. I really rate Alister Mcvicar for vettings, old school vet who will explain any findings to you from all angles so you can make up your own mind.
As a one-off for a vetting I could second the recommendations for alistair mcvicar at anvil vets but wouldn't use him on a regular basis again.
However cannot rate lingfield vets (particularly jo woodman) highly enough, brilliant practice.
Shotters and Byers and they're Dorking based. Put it this way, I paid a lot extra to get Mike Byers out to Oxford to vet my horse as I know how thorough he is. Mike will also talk you through the vetting and what he is seeing as you progress.