I'm wondering whether the bloke in green was following an escapee cat?
Off duty/plainclothes/CID police scream their day job. The men all seem to have the same shoes, blue jeans, shirt and leather blouson jacket, the women wear whatever, but they all have a particular posture/stance, they're constantly scanning entry points and all move their eyes in the same direction if somebody moves slightly differently or looks even slightly out of place. .
Used to get them in the local McCyD's of a morning before the courts opened up for the day. And before that, as a brat from a shithole deprived area, you'd walk past them to or from school as they were sat in their cars and wonder whose house was being raided today.
You might laugh at this, but a new friend had his dad visiting and the first thing I asked when I saw him heading towards us was 'your dad's a copper, isn't he? He's checked out every person in the pub and he's not even halfway through the door'.
Retired inspector, leather bomber jacket division, apparently.
It's obvious for me, depending upon what part of the paid stuff I'm doing
Black cargos, steelies, black t-shirt, black hoodie, sunglasses, torch and ear filters case attached to the belt loops - engineer/soundman/crew, for example. All black with soft shoes - backstage not lifting. Spotlessly clean, discreet makeup, hair up, big cloth shoulder bag containing a big leather folio, couple of books in funny sizes, large bundle of clothing, pencil with eraser top probably already above ear or poked into hair - performing.