It is Roger Pearse!
I have found a clear signature on a scan of Annals of Rome for the Amiga:
https://www.hobbydb.com/marketplaces/ho ... 1f4a22fc33
I am confident it is the same signature as that in the PSS games Battle for Midway, Battle of Britain, Bismarck, Swords & Sorcery and Tobruk. So we can add Roger Pearse as cover artist for these titles.
It is not clear if it is the same signature as that in Panic and Les Flics (both by PSS). It could be, and I strongly suspect it is, but the scans aren't clear enough to say for certain, so I don't think we can add a cover art credit for them.