In my experience with Vets4pets, they aren’t very good for rabbits. They have limited experience working with them, it seems. I used them for about 6 months until my two rabbits passed away - while I was using their advise. It may not be the same for every branch but it was definitely that way for the two local to me.
I use MediVet, if that’s any help. My local one takes all exotic pets (including snakes and parrots!) and they are very experienced, from what I’ve seen. The consultants on fee is £40 but they offer a vet plan for about £10 a month, which covers a lot of general care and a percentage off of consultation and medication fees. I’m not sure if there is one in your area, but they do supposedly have practices all across the UK