18:00Six O'Clock News17/12/2021 Boris Johnson's leadership questioned after crushing by-election defeatBBC Radio 4 Duration: 30 minutes Fri 17th Dec 2021, 18:00 on BBC Radio 4 LWAvailable for over a yearListen nowThe former Conservative leader, Sir Iain Duncan Smith, urged Mr Johnson to get a 'bloody grip' after the by-election lossGenresNewsBrandSix O'Clock News Source: BBC Online