Anger at former US ambassador Peter Mandelson’s relations with the child sex offender threatens to topple the prime minister

Serious questions need to be asked about Mandelson, Andrew and what the PM knew when. The credibility of UK politics is on the line, says Guardian columnist Gaby Hinsliff

The extraordinary revelations appear to lay bare the extent of the professional and personal relationship between the paedophile financier and the ex-Labour minister