On: I face investigation for terrorism

[_visgean]

He was detained in a room. I am pretty sure there was a printer nearby and they could give him those documents in writing.

[londons_explore → _visgean]

re-reading the act, it actually says "must be given in writing or (if not in writing) must be given in a manner that produces a record of its having been given;"

So being given verbally with a tape recorder or note-taker recording the interaction is actually sufficient. Sounds like the police had exactly that.