If there is any evidence he has had even one penny of benefit from his father's dodgy tax arrangement, surely Cameron has to go?
He's saying 'it's a private matter' whilst presumably working on his notes for next month's conference on cracking down on such tax scams. You really couldn't make it up. He will no doubt plead ignorance but that's no defence. He is the PM. He should know he's benefiting from is essentially large scale fraud.
Are we really going to let him get away with this?