There are at least 4 very good boarding establishments in the Hampshire / Surrey / Berkshire borders inlcuidng Winersh Warren, The Rabbit Crossing, The Doe Drop Inn and The Little Warrens all who provide very nicely sized accomodation and are very experienced in rabbit care. There are a number of others I know about but have not visited or do not have personal experience of.
I don't know exactly where you are so not sure if you are in the area where any of these are.
If you do a seach on the forum for boarding you will find a number of threads from previous which go through what forum members look for when considering a boarding establishment.