Former Foreign Office chief Sir Olly Robbins is expected to be grilled by the Foreign Affairs Committee on Tuesday.
The decision to send Peter Mandelson to Washington has become a scandal that just won't go away for Labour.
The Royal Family will be remembering the late monarch at events on Tuesday - on what would have been her birthday.
The Sussexes' four-day tour of Australia appears to have fallen flat with some.
It comes as a man attempts to ignite a plastic bag containing containing fluid in north-west London.