London Paediatrician to assess for ASD- recommendation needed please

[Mosquitoburrito]

Can anyone please recommend a private paediatrician in London who specialises in speech delay, ASD,? I see there are people listed at The Portland Hospital - can anyone recommend or otherwise? I’m really worried about my little boy 3:5 and really want to take him to someone ASAP who can either allay our worried or support us in helping him.

We used Dr Studnik at the Portland and were v happy. Had diagnosis in 3.5 months after initial call.