UK holiday park recommendations please

[SASHotchner]

We’re looking for a short break in the UK so looking at holiday parks. Our 11 year old is profoundly autistic so our only real requirements are a good pool as they adore swimming, a softplay and a nice decent site.

We live near Cambridge so wouldn’t want to travel for more than 3 hours ideally. Could anyone recommend somewhere?

I have been to Darwin forest in the Peak District a few times. Not a massive site but a nice pool and soft play (the soft play is open to the public but there might be quieter slots).
Quite a lot to do in the local area and good walking if that is your thing.