The above article said they were on tourist visas. I'm surprised that Canada requires tourist visas from the UK as they are both in the Commonwealth.Visiting relatives? Tourists?
Probably explains their quick return to the UK.
Perhaps they were running out on the bill as a ‘lark” but Sharif was badly hurt, then died.
If they had return tickets, knew they were leaving? Stiff him for the meal. Common as muck criminals.
ETA. I think the manslaughter charge reflects my supposition.