Host and team leader Paddy McGuinness is joined by Beverley Callard, Anton Ferdinand, Kimberly Wyatt, Chris Hughes, David Ginola, Charley Boorman, GK Barry, Fats Timbo and Victoria Pendleton as they attempt a world-first relay highwire walk 100ft above the London Stadium - home of the 2012 Olympics and Paralympics - in aid of SU2C.