I used to work in a couple of camera shops, including jessops and i would say that if you strike up some banter then they might do you a bargain. When i worked at Jessops they were quite good with quality control but unless you've got a man on the inside its tough to squeeze out perks and bargains. So i'd recommend getting the banter with a local independant company but you'll need to gauge how interestd they are in thier job and if the lab equipment looks old and battered as some older labs have been retro-fitted with digital so the quality might be poor, although they may offer a better quality film service. The best bet is to take some random drunken photos, where quality isn't as important, and do some tests