Stuntman takes the plunge live on Channel 4 for Michael Fassbender film

Updated: 

A Hollywood stuntman will freefall almost 100ft live on air during a Channel 4 ad break.

Viewers will see Dave Grant jump without a harness, and at a speed of more than 50mph, at the site of a derelict flour mill, to mark the UK release of the new Michael Fassbender film Assassin's Creed.

The action-adventure, also starring Marion Cotillard, sees Michael's character freefall dive from the top of tall structures.

Michael Fassbender (Ian West/PA)
Michael Fassbender (Ian West/PA)

Stuntman Dave will perform the stunt outdoors, in the dark, at Millennium Mills, in Newham, east London.

Hollywood star Michael said: "The action sequences in the movie are shot in an old-school fashion... in geographical locations with real people, with very little CGI or special effects.

"In the movie (stuntman) Damien Walters performed a record-breaking leap... from 120ft, unassisted by wires and ropes... I'm very excited."

The 100-second ad will air on Sunday December 18, at around 9.10pm, in a break in Channel 4 drama Humans.