For chemistry the Jessops website is pretty cheap and delivery is fast. Some websites have a minimum order, Jessops don't. For the equipment, Jessops or maybe ebay. So many people are (sadly) giving up on film the kit goes very cheaply.
I wouldn't put money on Jessops being around in a year, and even if they are I doubt they'll continue with film chemistry, so get it while you can. This stuff is just going to get harder to source and more expensive too.