An old saying holds that "The French fight for glory, the English fight for land, and the Americans fight for souvenirs."
While there is no doubt truth to this observation, may I note that the British were also quite good at collecting souvenirs, and what follows in an excellent example of that fact.
Below is a painting by Geoff Nutkins, the legend for which reads "Smoke rises from the wreckage of a Dornier Do 17 bomber, part of a force sent to attack RAF Kenley on 18th August 1940. The Dornier was brought down near Biggin Hill by Sergeant Ron Brown of No.111 Squadron, whose Hurricane flies low overhead.
Eagle Day - Scenes of the Battle of Britain - Aviation Art by Geoff Nutkins
This is then a photograph of the actual Do-17 that was shot down. Notice any obvious differences?
Well, in the painting the swastika on the tail is evident. In the photograph the swastika has been cut out and no doubt rests somewhere today in a Great Britain collection, such as that at The Shoreham Aircraft Museum - Exhibits which houses several pieces of this bomber. As a matter of fact, I'm told that guards had to be posted to keep out the souvenir hunters.
Fortunately, before the guards got there, some souvenirs ended up in the hands of certain craftsman that prepared desk displays such as that which follows:
I purchased this off ebay about 15 years ago. Those were the days.
Incidentally, all crew members of the Do-17 survived and August 18, 1940 is referred to as "The Hardest Day". An excellent book by that name was authored by Alfred Price.