You mean german bomber i think. make it part of
Operation Steinbock - Wikipedia then look up the planes that flew against Blighty in the order of battle in the link.
I would take the He177 that is a big bomber with being prone to develop an engine fire. Let him hide in a tool car because the base would be guarded and he is small enough to do so, for explanation of how he gets to the plane in the first place.
And in your story the engine fire could be why everybody jumps. Kid crawls back to the cockpit en there you go.
This is a He177 from that period. see for more pictures
Heinkel He177
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