Valid points though - without Bank of Mum and Dad unlikely a 25 year old would have a house.
Only 20% of people 25-34 own property in London. Was 47% 20 years ago
And the BA threads on this site do have lots of discussion how for some people LCC is a better deal, so they do leave
Of course, HK has worse problem than London on housing, and the fact that LCC are competitive with BA is a good thing - more choices of where to go rather than limit to flag carriers