Originally Posted by
lhrworker
No markings but all aircraft HAVE to carry a registraion whether military or civilian, all countries, the original op did not post whether it had a reg or not
Call me crazy, but a registration is a marking, and here is the first sentence of the original post, the op said he didn't see any "tail/reg numbers".
Originally Posted by
manord
Just saw an unusal plane land at LHR. All white, no markings visible (including no tail/reg numbers that I coud see).
As I said, that is highly unlikely, and you seem to agree with that now.