Alternatively, you coukd try to get all dc's needs met in one place - a specialist epilepsy school. There's St Elizabeth's in Hertfordshire (an onsite team of nurses) or Young Epilepsy (an onsite team of doctors and nurses) in Surrey, both have visiting consultant neurologists. I think both start from 5 years old. Its unlikely anybody would support a residential placement for a 5 year old, so you would have to live near enough for a day placement. Unfortunately, I can't recommend any of the nearby Local Authorities, such as Hertfordshire, Essex, Surrey, Kent, or East Sussex. However both schools have a fair few children from their own counties, so parents do get them there!
Some special schools (SLD schools here) have an onsite nurse, who may be very good on epilepsy, as it tends to go with the territory - whereas MLD schools here don't afaik. It will depend on the LA, and where dc's learning disabilities lie?
In the SE, I suggest you try to get dc under Gt Ormonde St in London, which has links with St Elizabeths and Young Epilepsy. Prof. Helen Cross of GOSH used to manage the epilepsy of the children at St Elizabeth's - I am not sure who does now. She is the health trustee of Young Epilepsy, although she has more of an advisory role there, than hands on. Both schools have an FE college, and St Elizabeth's has adult day and residential services.
In the NW, the David Lewis Centre has a specialist epilepsy school from 16; a FE college, and Adult day and residential services. They have an medical centre with visiting consultant neurologists one day a week, and an onsite team of doctors and nurses.