Was sacking Sir Olly Robbins over the Mandelson vetting row the right call?

Sir Olly Robbins, former Foreign Office boss, was sacked after granting security clearance to Lord Mandelson against UKSV's recommendation not to approve it. He claimed he only received a verbal briefing describing the view as 'borderline' leaning towards denial, not an explicit recommendation. The government is investigating if he was given correct information, while the row raises questions about Sir Keir Starmer's judgment.