Going by the trailer, it looks like that's the kind of role given to Mark Rylance
Except that at 56 (and not a youthful looking 56) Rylance is way too old for that sort of role - by 25 years at least. However this is often the case with war films - even the excellent
Battle of Britain had some distinctly elderly actors playing fighter pilots, when at the time 30 was regarded as "over the hill". Michael Caine was 35, Christopher Plummer 39 and Robert Shaw was 41 - but I suppose its wonderful what you can do with makeup!