According to Deadline, the film will be drawn from the events in April 1980 when six armed gunmen took over the Iranian Embassy in London and held more than two-dozen people hostage. The SAS laid siege to the place and a tense standoff happened across six days, with the forces preparing to raid the place when the time was right.
Fraser, who last directed The Dead Lands (2014), is once more teaming up with writer Glenn Standring, and they have several former SAS members acting as consultants while filming takes place this summer. The rights to the film will be up for sale at this month's Cannes Film Market.
Strong, last seen in Kingsman: The Secret Service, has worked on science fiction thriller Ad Inexplorata and Louis Leterrier's (Now You See Me) comedy Grimsby, which arrives on 4 March next year. He is also attached to the thriller Jadotville. Bell will next be seen as Ben Grimm in Josh Trank's (Chronicle) Fantastic Four, which is out on 6 August. As for Cornish, she will next appear in mystery thriller Solace and Dean Devlin's feature debut Geostorm.