This could be a long thread.
Some folks might just take a bag of caramels!
Here's what I can remember of what's in the car right now - in addition to the kit I carry year round.
If I was going on a long journey I'd take more food. The food I've listed here is for Emergency only.
Jump Leads
Complete set of Snow-Chains
Closed-Cell-Foam Kneeling-Mat
Waterproof Gloves
Tow-Rope & Shackles
De-Icer
Fleece Blankets
Foil Survival Blankets
Folding Shovel
Hand Axe
Torch
Head-Torch
Spare Torch Batteries
Spare Mobile-Phone with £10 Credit
2Litres -60degreesC Windscreen-Wash
4Litres Jerrican Water
5Litre Jerrican Diesel
SBS Emergency Survival Kit
SBS Emergency Survival Food-Box
Assorted 'Nutty'
Chocolate Bars
Muesli Bars
Self-Heating Drinks Cans
1.5Litre Bottle Sparkling Water
Dark Glasses
Furry-Hood Parka
Thermal Gloves, Scarves, & Hats
Thick Socks
Hiking Boots
Walking Poles
SV.