Hallo Peter
I must I admit I hate to be a pain in a most prominent place of yours...
However I fail to see the connection, perhaps because I don't have full details. I DID look at the gruesome photos (thanks Ed) at the time, but I myself am at a total loss to make out ANY serialnumber in these photos plus the distressing fact that the photos state 11.5.1940 and not 10.5.1940. That of course can be a mistake from the individual who wrote the text on the backside.
Unless of course you can ID the wounded/dying airmen in the photo(s) the only useful item we actually have is the letter R on the Battle a place name and the date 11.5.1940.
The two books I have are of course not very exact in detail as regard to the exact spot each Battle fell that day, so I can only assume you have more detailed info in the checked loss reports of WHERE these Battles were shot down/went missing, but since the two young crews most certainly was on the same mission and succumed more or less on the same time they surely fell quite close?
From my point of view, I fell you gallop ahead of me here, and just perhaps are jumping to conclusions. I don't know to be honest, but as a side note, I am sorry I started this thread since looking again at the photos the futillity of war and all the needless sacrifices the European youth had to make in the face of political follies makes the chasing of which individual who was in which Battle rather crumble into ashes....
All the Best
Stig