What's in the boot of a UK police patrol vehicle?

I'm working on kitting out an SUV for a police department I've based heavily on UK cops. Current loadout includes 8x collapsible traffic cones and 2 fire extinguishers, plus the stock roadside assistance kit.

I'm not asking about ARVs, for the record, that's already been sorted. What are the big things (bags of kit included) that you can find in the trunk of your police vehicle?