Careless not deliberate: whats going on with Nadhims Zahawis taxes?

The story of Nadhim Zahawis taxes has been rumbling on for months; now it may have finally come to a head.

After the Guardian revealed on Friday that Zahawis settlement of an HMRC tax bill worth millions included a seven-figure penalty, the Conservative party chairman and former chancellor gave his version of events and said that his error was careless and not deliberate.

But after the foreign secretary, James Cleverly, endured a torrid interview round defending Zahawi on Sunday (and said he was not fully informed about the story in part because he had been having a bit of a rest and doing some shopping on Saturday), pressure on the government continues to build. Now Rishi Sunak is facing calls for him to explain what he knew about Zahawis affairs when he appointed him to his current role.

What is the story about?

Before he was a politician, Nadhim Zahawi rose to prominence as one of the co-founders of YouGov, a polling company.

When YouGov got started in May 2000, a Gibraltar-based company, Balshore Investments Limited, was allocated shares equal in value to those given to Zahawis co-founder Stephan Shakespeare 42.5%.