Private Child Assessment / Diagnosis - West London

Hello, my 12 year old daughter has finally been referred by CAHMS as she is showing quite a lot of markers after we sought help for her severe anxiety. NHS waiting list is 24 months though and with her off school now for over 8 months we are really desperate to get help sooner. She is getting more and more isolated and the stress is really hard for us to burden Can anyone recommend an accredited place for private assessment in (West) London?

Thanks