Paying tribute to "magnificent Mortimer", who died in January aged 85, Lord Kinnock said he was a man of contradictions who was both a reflective introvert and a sparkling extrovert. The former leader of the Labour Party, of which Sir John was a lifelong supporter, said Mortimer was "trying and tender, provocative and disarming, unsure and swashbuckling, naughty and grave, all at the same time".