London Bridge Cordoned After Reports of Gunfire Watch
"However, as a precaution, we are currently responding to this incident as though it is terror-related.
"One man has been shot by police.
"We will provide further information when possible."
didn't look like it? were you there? go on bbc news they've been interviewing a few people and 4 of them have said he was wearing some sort of vests
He was wearing a dark hoodie so a dark vest can be hard to see on shaky phone videos. Considering has was wielding a knife my guess would be it was a plate carrier vest.