Hi @LiteraryLark

I asked my daughter to specially make you an esential list. Here it is.

road map
small foldable snow shovel, tyre mat(s) for snow / mud traction
hand-held GPS unit
no-spill petrol can
car fire extinguisher like mummy's
towing strap or chain
soap / hand sanitizer,
towelettes
small trash bags
rain poncho / plastic sheet
paracord
candles / LED headlamp
spare AA + AAA batteries
comprehensive first aid kit including safety pins
roll of duct tape
emergency splint kit (UK cost about a tenner)
fixed blade knife in holster, multitool, or folding knife, but do NOT use liner lock knives cuz potentially dangerous if slipping, cut your fingers. preferably buy a frame lock knife.

tent
rainproof matches
SOG Flint (kit includes fire starter, steel wool tinder compartment, tungsten carbide tipped window breaker, safety whistle
lighter, tin containing tinder (6 pk)
survival reflector emergency blanket
emergency car battery charger
solar battery charger
extra pair of shoes, gloves, woollen hiking socks, merino wool beanie, woollen jumper, waterproof / Goretex boots
underwear
Note: acrylic clothes when wet do not conduct warmth from the body. Acrylic fabric can cause hyperthermia
26800 mAh (or higher) power bank and/or cell phone charger (to be left in car at all times)
battery powered and/or hand crank radio with NOAA Weather Service

sleeping bag(s) and wool blanket
survival reflector emergency blanket
catapult (check legality)
rabbit snares
seat belt cutter+ glass breaker (some can be attached to seat belts)
if possible safely stow £500 in banknotes and coins
durable waterproof bag for stowing items (Nixwax waterproofing kit useful)
spare waterproof jacket, pair of warm gloves
It would be sensible to learn unarmed combat in case you are mugged. Like mummy I've been trained.
Lastly, please go on a survival course like me. I am a survivalist with 3 years know-how.

Love,
Juni