About vets not knowing what to do -- I did indeed switch from the vet I had already been taking my cat to since he was a kitten, to a completely new vet just in order to have a knowledgeable staff take care of everything.
Caveat: You should STILL do all your own research so that you are totally on top of what has to happen, independently. I think it's vital to know yourself what the process is -- research here and on the web in general, call Defra, do everything you can to famiilarize yourself with every step so that the vet can work with you and you can catch each other's oversights.
My original vet had NO CLUE. When I called them and asked them about preparing a cat for entering the UK, and mentioned the rabies titer, the receptionist, at least, di not know what I was talking about. If the receptionist had never heard of the process then I had very little confidence that the vets themselves did.
So I literally called around the Yellow Pages until I found a clinic whose front staff knew exactly what I was on about and even volunteered "Oh yes, we 'did' a dog for the UK last week -- we still have her paperwork if you'd like to look at it!" !!
I booked with them immediately and have never been happier with a vet clinic in my life. The vet who handled everything was so good I wished I could have moved her to the UK with me to go on being my cat's vet, lol.
But yes, the moral of the story is, if your vet is clueless -- and some of them actually are as it may so happen their clinic simply has never dealt with an overseas preparation of an animal -- do go ahead and call around until you find a clinic that says right from the get go that they know the process intimately.