Thanks for the information. As a complete non plane person I wasn't sure if this site was appropriate. I feel quite proud of working out they were a Junkers 52 and a Douglas DC2.
I did think Croydon maybe. Pre-war as Luftahansa post war didn't use Junkers (I think).
Easy to say don't throw them but I am having a clear out and am getting rid of everything non essential.
Other two attached. Somebody may be identify the ground in the one from the air (or even the plane).
Again, many thanks for your time.