Quote Originally Posted by Rock_Flock_of_Five View Post
How were customers in the bar able to know if someone was a plain-clothes officer? Because they weren't a regular, were clean-cut looking, dressed more formally than the average punter or because they were drinking alone?

It has happened to me a couple of times (wrongly accused of being a police officer). Once, was when I was drinking in the Carpenter's Arms, Rumney and the other time was when I was in the Big Windsor, down the docks. In both cases they were adamant that I WAS a copper - and no, I didn't leave...
All of the above but mainly because they weren't a regular,its quite easy to make people who are strangers feel uncomfortable in a hostile enviroment.