Osborne saying that house prices will fall if we leave the EU.... come on! That might not be a good thing to the ultra-rich property owners like himself but for around 90% of the population it is! Congratulations, you have now convinced a whole bunch of people to vote for the opposite to what you are campaigning for, well done.
Eh, it might turn younger people towards Brexit (although it'd be a something akin to decapitating yourself to spite one's nose) but at the same time it may have swayed some of the older generations (a lot of whom are home owners) who were leaning towards Brexit to vote remain to preserve their house prices.