Brittle Asthma specialists for a 13 year old

I wonder whether anyone has had any positive experiences with a paediatric asthma specialist, specialising in brittle/severe asthma, and could recommend one? My son is about to be referred by our specialist to Kings in London and I'd like to make sure he is sent to someone really good instead of (as has been the case) just being pushed from pillar to post to people who don't know how to handle the complexities of his asthma.

Thanks

[Thomass_mum]

I can't answer this but would just like too add I would be interested in any answers too. My son has difficult to control asthma but his consultant is proposing referring him to RBH.

Jenny.