Harlequins have staged their Big Game spectacular at Twickenham’s Allianz Stadium since 2008 Gallagher Premiership: Harlequins v Leicester Venue: Allianz Stadium, Twickenham Date: Saturday, 28 December Kick-off: 18:00 GMT Coverage: Listen on BBC Radio 5 Sports Extra, BBC Sounds and the BBC Sport website and app, and read the match report on the BBC Sport…