Hiya, I'm located in Darlington. Sadly, there are currently no RWAF approved vets in the Darlington, Middlesbrough area.
I currently use Medivet Darlington which used to be Stanhope Park Veterinary Hospital before the vet/owner retired and sold the business.
To be honest it has gone very corporate since the sale, they've been having problems (like other vets I suppose) in retaining the vets and have closed the exotics branch. A few of the more rabbit savvy vets have moved on, although I've not had any problems with treatment as such but I have had communication issues, problems with claims, etc.
Also their out-of-hours services is now provided by the branch in Thirsk, which is ridiculous to travel in an emergency. I don't think any vets in Darlington have OOH's services located within Darlington sadly, not even Grange Road.
I have heard really good things about Jacqui Paterson's Vets for exotic animals, they has 3 practices located in Hartburn, Preston Farm & Nunthrope. The Preston Farm branch also has Vets Now located in the building who provide the OOH's services.
Not sure about the practice, but I will recommend the veterinary surgeon Andrew Cloney at Vets4Pets Middlesbrough (Cleveland Park Vets). Him and his wife used to work at my vets around 9-10 years ago, he left and set up the practice in Middlesbrough. He was an excellent exotics vets, I was sad to see him leave and did consider following him. But at the time my vets had decided to the open the exotics branch and had a brunch of really great rabbit savvy vets.