Sargs,
Thank you very much for your post, I had a look on Google at your position and believe I can see the debris you refer to. Strangely, I did a complete look at South Jason and missed it. It only deepens the mystery. If these wrecks are indeed related to Coventry's 9th May engagement. In my opinion they were not as they would have been undetectable, so a bad weather CFIT fits the bill. I guess we may never know what unit they belonged to and when they were launched.
Jualbo, the Bomb Disposal expert on Antelope did report a French bomb/fuse and had no knowledge of how to defuse it. More fog....