I think this depends on area, because they do where I am. Lots of families here choose to go private, particularly with adhd diagnosis and then transfer to GP and get treatment (medication) that way.
All across the UK some kids get diagnosed on the nhs very young and some kids don't and have to go private.
The majority of children at the sen schools I oversee the 4 year olds all are nhs diagnosed and that's part of the reason they got into a specialist school straight away.
Alot of kids stuck in mainstream with no diagnosis end up going private and get diagnosed slightly older due to the waiting . Though some get good ehcps even though undiagnosed and get into specialist regardless.
Wait what?? Is this the same dad who's twins were formally his content until they were no longer small cute and instagrammable?' is he still trying to flog his life?!
Yeah his daughter is a teenager and very articulate. But she still cannot give informed consent to her life being on social media xxx