No I wouldnt want it removed but when ownership isnt known-a comment to that effect should be made. (ie Origin of photo unknown/thanks to unknown photographer etc?).
For info I dont recall the exact date but think it was probably 1970 or 71.
I was working for Courtline and in those days we handled the majority of diversions and extra flights etc. (No Servisair/Menzies etc then).
There were three of them in-one on the "pond" and the other two outside the Monarch hangar. I have some poor photos of the Trans Union DC-6 and one of the European Heralds. They were the last Connies I saw at Luton anyway.