Earlier quoted context omitted.
Which actually made me wonder - where/how do London academics live? I find it hard to imagine them commuting for hours from the suburbs - it does not seem very consistent with an academic life - but I do not see them being able to afford to live near their universities either.
I imagine that a knighted professor at Imperial can comfortably access a mortgage in London, so I doubt this applied to Martin Hairer. But, post-graduates in London (if they have no other source of support) do tend to have a difficult lifestyle. Not recommended.
You don't get paid for being knighted. And these universities have a mostly fixed pay scale it's not like Google where you can just demand whatever you want if you're good enough.