Nick Thomas-Symonds said he lost personal photos and exchanges with former U.S. ambassador to Washington Peter Mandelson.

The Cabinet Office will no longer release a summary document on the peer's security vetting ahead of his appointment as Britain's ambassador to the US.

Text messages between the Labour peer and Sir Keir Starmer’s former chief of staff Morgan McSweeney are said to be included

Ministers were braced for embarrassing revelations ahead of the publication of the files on Monday afternoon