I was going to ask the same thing soon too!
The website for Garston doesn't work which is a shame because just so close, but Nutwood looks good too (I have a friend who lives near so I could maybe arrange to visit)
Be interested to hear what you find out, although Jenson is a housebunny so I would need to check that too!
If Harlow isn't too far, Leanne (moderator on here) also does bunny boarding. She can have indoor or outdoor rabbits and i can highly recommend her!! My two look almost disappointed when i turn up to bring them home!!! :lol: