Pah, that'd mean 2 of his kids sharing.
I know. Such suffering.
Thing is, we all know zone 1 rents are crazy but they're really not so crazy that someone with 36k per year to spend isn't going to be able to find a place. There are plenty of options. If he is genuinely using it as an excuse then he is either looking for houses that don't actually exist (large family homes with gardens and garages) or neither he nor his staff can do a google search. Or he's an idiot.
His salary is massive. His expenses, on a very generous scheme, make his salary even sweeter. He even gets to employ his wife.
Stuff like this makes me think we shouldn't allow rich people to be MPs. They don't compare their lot with the real world - they compare it to their peers for whom this really is button money. I'd rather we had a proper working class hero who can fight to reduce the price of woodbines. It's what we all want down the pub.