The ideal things to begin with,
My ideas :
400 tog sleeping bag. - Argos
Cooking utensils. - argos or second hand shop
Cup. (Metal) - argos or survivalist shop
Heavy socks. - ebay, argos or market stalls
Walking boots.- ebay/ sports direct
Tent / canvas. -Hardware store
Roll matt. - Argos
Tinned food. - pound shop
Water. - Anwhere
thin roll metal wire - hardware store
Decent rope - hardware store.
22 PIECE FIRST AID Basic - argos
Flint / strike. - Fishing shop or ebay
Fishing tackle. - Argos /fishing shop
HUNTING KNIFE
axe large /small. - Hardware store
String. (Ball of twine)- pound shop or market stall
Ebay.co.uk and argos.co.uk will help