TBH, I think you'll be glad you didn't get it in a little while - W London prices are so unrealistic at the moment and the only way is down.
I used to live in Ealing and was truly shocked when I had a brief glance for old time's sake at Ealing prices. Flats in the very manky road we used to live in - a whole long street, all absolutely identical maisonettes, in W Ealing - I happen to know went for a shade over 60K about 11 years ago. I saw a couple there for 325K+,

advertised last week. As I used to live in one I know they are really shoddily built, manky flats and in a pretty grotty, inconvenient area - I doubt I'd buy one for 60K unless I fancied getting into BTL (which I don't). Anyone who buys one for 325K, let alone more, is an absolute idiot.
Not suggesting that you are - I assume the place you found was much nicer - but am just trying to demonstrate that with regard to a particular street whose history I happen to know well, going up over 500% in just over 10 years does not seem in any way sustainable.
Give it time, prices will return to something approaching sanity again - W London is nice, but not THAT nice...