I agree with Colin; Category E means scapped, basically. Even if substantial parts of the aircraft remained, fire damage would automatically bar it from being re-used, due to loss of metal(s) integrity. Also, after 1942, the MkIIa was virtually withdrawn from service, with the MkV and then the MkIX available. Remaining airframes being either converted, stored, or used as training ot instructional aircraft. It's probable that this serial number is perhaps the only one known, and that other aircraft, of different Mark numbers, were used subsequently.