As the families of the other missing and dead from the attack identify bodies and confirm the deaths of their loved ones, Mr Thomas' family may never get this closure, as he has still not been found.

Nathalie Cros Brohan, his sister-in-law wrote on Facebook on Wednesday morning:

"I thank you also for having had the kindness to share my call to witness to find my brother-in-law Xavier Thomas.

"But there is still no news from Xavier. The silence and waiting without knowing what happened to him is so horrible. We want to believe in a miracle. But unfortunately, we fear the worst.

"My sister was operated on yesterday and her condition is stabilised. The medical team in London is remarkable and dedicated.

"Thanks also to the French and English authorities who have given us great psychological help."

The couple were walking south over London Bridge at around the time the attack started.

They had been out with a group of friends, all from France, but they have been unable to find him since.

Witness accounts suggest that it is possible that Xavier was struck by the van that resulted in him being thrown into the River Thames.