try your nearest agricultural merchant. they should have almost everything. feed, drinkers,feeders, mesh, staples,bedding, mite powder, disinfectants etc. have a word with the chap from outgate, he must get his stuff fro somewhere. he may even sell it himself? basically you will need a layers feed, pellets or mash. bought in 20 kilo bags @£6-7. will last ages with four birds. something to feed them from, and let them drink clean water from. somewhere secure to sleep, and to roam during the day. shavings or straw for the nesting box. some shavings or sawdust for the hut floor to make it easier to clean. (absorbs the liquids) some mite powder to keep them clear of bitey things. some additive for their water ie apple cider vinegar or bird tonic to help keep them healthy. a bit of oyster shell grit to aid digestion and shell formation. and at some point a wormer. a lot of stuff can be bought on the internet from places like regencey poultry, or ascott etc , also e bay. but if you have a good merchant nearby you can get it all in one journey and save carriage charges.also you bump into other hen keepers and can swap info.