Tongue tied

Little Leon was born with a tongue-tie, apart from that he's perfect - he just can't stick his tongue out. No problem with feeding which is why the GP won't refer us to have it snipped - but we WANT to have it snipped! Not because of fears of having a lisp (Jamie Oliver has one and it can be cute!) or to save him problems of kissing later on in life... but mainly because we're raising him to be trilingual and this might make it that bit trickier for him. Also, he wouldn't be able to pronounce his own name easily! Hopefully the GP changes her mind on Monday when we see her next and will refer us due to speech issues.... If not, could anyone recommend a specialist in London area?