Lightweight waterproof hi-viz jacket.
Waterproof hi-viz trousers.
Waterproof black trousers.
Spare breath-test tubes
FPN holder (with tickets in, obviously)
Sunglasses is a sturdy case
A pair of slash-proof gloves.
A pair of leather gloves that actually fit me.
A load of various sized knife tubes.
One large knife tube containing a load of sterile swabs.
A large evidence bag containing small, medium, large and extra large evidence bags, neatly folded to fit.
A proper face mask for mouth-to-mouth (not one of those crappy face shields that come in a little packet like a napkin).
Tyre depth gauge
Type pressure gauge
A copy of Blackstones Operational Handbook
Hughes Traffic Guide
First aid kit.
A large A4 document wallet thing with all my paperwork (DASH books, RTC books, statement papers, burglary packs, CCTV forms, etc etc)
Usually a half-drunk-and-now-flat bottle of Lucozade in there somewhere too.