https://www.bbc.co.uk/news/av/stories-50101360/buttmitzvah-is-a-jewish-queer-club-night-that-s-held-in-london

The truck was registered to a company in Bulgaria, but it hasn't been there in a while, so it could have been anyone inside.

Probably a botched people-smuggling operation. Someone was negligent and allowed them to freeze to death.

Cringe.