I believe that there still exists a Conway powered Lufthansa 707 so perhaps G-APFJ is not the last surviving B707-400s series? However the Cosford Trident is the only preserved Trident 1C in the whole world. G-ARVM is the only surviving passenger ( non exec ) Standard VC10 in the world.
Please somehow find a way to move them completely and put them back together as whole aircraft !!! This is cultural vanadalism of the highest order - a short sighted folly by people who ought to know better.