pedan3 wrote

He proceeded to recite to me, word for word, the standard police
caution for arrestable offences. I opinted out that he was not a
police officer. He said he never claimed to be.

It's the PACE required warning now I think and anyone who is employed
to investigate crime has to give it (below) whatever the offense if the
statement might be used in court. So not just police but also Customs,
Revenue and VAT, vehicle examiners, BT, Post Office, Gas, Electricity
investigators, RSPCA, NSPCC and probably Jockey Club and Greyhound
Racing Assn.

--
Mike D

You do not have to say anything, But it may harm your defence if you
do not mention *WHEN QUESTIONED* something you later rely on in court.
Anything you do say may be given in evidence.