[Production
It was announced in November 2018 that filming
had begun in Budapest on the film.
Sam Heughan, Ruby Rose, Tom Wilkinson
and Owain Yeoman were announced as being cast at the time.[1]
Filming continued to February 2019,
with London and Paris also serving
as filming locations. Andy Serkis, Hannah John-Kamen,
Tom Hopper, Noel Clarke, Ray Panthaki,
Jing Lusi, Douglas Reith, Richard McCabe
and Anne Reid were announced as being in the cast.]
Great it was made Pre- Covid.
https://en.wikipedia.org/wiki/SAS:_Red_Notice
A Sky Original Film.