A crashed ME109 in France.

A crashed BF109 in France. The BF109 was the product of the Bayerische Flugzeugwerke & retained it's "BF" designation thoughout. Only aircraft produced after the company became Messerschmitt in 1938 were designated "ME".

Given the presence of American servicemen, if it is in Fance this would date it post June 1944, by which time the BF109 model most likely to be seen would be a G-6. The large spinner & broad propeller blades are from later variant, though as the engine covers are not present (or damaged), other identifying features such as the enlarged fairings over the engine mounted guns prominent on the G-6 cannot be seen. Could otherwise be a G-10 or K-4, both late war variants & similar to the G-6 but not produced in as large numbers (the G-6 was built in the largest numbers of all variants).

As for the bike, Norton 16H maybe ? Girder forks, a bulge on the primary drive cover over the crankshaft & quite a "full" cylinder compared to BSA models. The photo is reduced size (scanned from a book ? ) - do you have a link to a better copy to try to enlarge that area ?

Nigel B