Labour made claims re Johnson's tax affairs while he was Mayor Of London, so he released his tax returns and he'd paid £916,481 on an total income of £1,985,901 over the previous four years.
Interesting.
Not saying he definitely has here (and I have no proof), but there are ways to conceal (as well documented).
Wonder how much his family his worth?
Also, might get messy when he has to leave it to his kids.