Re: Hi Vis...
... especially effective if a suit and tie is visible underneath
And you have a clipboard with some official-looking papers.
In the late 70s/early 80s my dad was a buildings surveyor for a largish London firm with buildings over looking the Thames in an expensive bit of town. He'd get sent off to a condemned squat one day and Heathrow the the next.
On one trip to Heathrow, armed with a clipboard and a dictaphone, he found that if he walked up to a door making notes people would go out of their way to let him through. No security checks, just let him through. Apparently it was all fun and games until he found himself airside with no way to get back in to the terminal without a lot of explaining.
Fast forward 20 years and he was running an odd-job type of building firm and got the job of fixing some lighting at a car hire concession at Stanstead. With arrogance typical of the trade, he rocked up, stopped his car on double yellows with hazard lights on, and went off to work. Thirty minutes later he returned to his frankly fucked Ford Capri abandoned in the drop off point guarded by a pair of very unamused armed policemen.
Biting the hand that feeds IT
