Boris has now released details of his earnings, tax and NI paid for the last four years, showing he had no income from companies and paid about 45% total in tax over that period from an annual income around £400,000.
The pressure is now on Ken to follow up - the politics might be boring but the sideshow is livening up!
http://www.bbc.co.uk/news/uk-england-london-17622189
Some trivia to bring up a local link to this, the conservative agent for this area in the late 90s moved on to be Boris's agent when he first became the MP for Henley on Michael Heseltine's retirement.