If Olly Robbins stood firm Labour could have avoided this disastrous episode of bad political judgment, says Richard Dearlove, former head of the British Secret Intelligence Service

The 50-year-old, who has served three prime ministers at Number 10, will face MPs on the foreign affairs committee on Tuesday to give his account on the scandal

Robbins was forced out as Foreign Office permanent secretary over the Mandelson vetting revelations in the Guardian