I can name a few though a couple are specialist SLCN and Dyslexia and some are boarding .... Moorhouse , More house , St Marys Bexhill, St Dominics iow, Farleigh house , Frewen college ....just a few for you to Google
DS (18) has been on a supported learning course at the local college for the past two years. I was intially very apprehensive but it's worked really well. They are mixed ability and have another unit for more specialist care. Its not boarding though. We are in Herts.