Chief property and security officer Ian Collard set to submit written answers to foreign affairs committee questions

A key figure in the row over Peter Mandelson’s appointment as UK ambassador to Washington will not appear before a parliamentary committee of MPs to give evidence.

Emily Thornberry had requested that Ian Collard speak to the foreign affairs committee (FAC) on Tuesday, but confirmed on Saturday that he would submit written answers instead.

Whether he felt under pressure to deliver Mandelson’s clearance, after Robbins said there was an “atmosphere of pressure” and “constant chasing” from Downing Street.

Whether he had seen the cover form for Mandelson’s vetting by UK Security Vetting (UKSV), the agency responsible for checks on candidates for sensitive posts, in which it had ticked two red boxes – meaning they had “high concern” and recommended “clearance denied or withdrawn”.

If he was asked by anyone in the Foreign Office, Downing Street or the Cabinet Office for advice about whether Mandelson required vetting for the post given that he was a member of the House of Lords.

If he advised on how Mandelson should be treated during the period between his appointment being announced and his clearance coming through.