Vampires can be remarkable survivors.

VV217 was outside with the Air Cadets for over 30 years before I purchased it.

It the went to the North East Aircraft Museum from 1991 where the pod was kept under cover before finally being donated to the De Havilland Aviation Centre where it is currently stored awaiting restoration.

The pod is basically pretty sound despite the many years outside

So I feel sure the other ATC airframe would have been restorable, but aircraft preservation was in its early stages when it was scrapped