….and the follow on reports just get plain weird.

A French submarine was unaware that it had rammed and damaged a British nuclear sub in a mid-Atlantic collision until it was informed by the Royal Navy.
…
The French Navy claimed this month that Le Triomphant’s bow sonar dome was probably damaged in a collision with a submerged shipping container while returning from patrol.

It discovered that it had hit a British submarine only after one of their regular exchanges of information with the Royal Navy.

Awwww — come on. Someone being a cheeky monkey Limey?