Multidisciplinary assessment needed for 12 year old - North London

Does anyone have success stories?

Nice peadtrician?

Not costing an arm and a leg 

Or if costing an arm and a leg - what sort of cost am I looking at? 

Obviously can travel but rather keep it local to not disrupt family life unduly  (other kids to look after Etc)

I realise £££££ for speech  / psycologist / psychiatrist / peadtrician 

Looking for private MDA recommendations 

Thanks v mich