Hello again, thank you for the advice and information.
‘Never seen the need for anyone to own such stuff personally.’
“Never been through a war like WW1, have you. And you clearly have no idea at all what significance that single round has to its owner.”
The single .303 bullet was found in the personal possessions of my friend’s mum who died recently. It was her father’s. He brought it back with him from the Great War, presumably as a momento. The war affected him hugely, and his children in turn.
As yet it remains in the UK and is most definitely not the cause of the Eurostar malarky.