Hi Peter - I didnt go with the developers pack as the quality was not good and it was a lot dearer than elsewhere. After lots of research I choose a local business and got everything from them and it worked out at £4000 for a 1 bed which moreorless included everything including full size fridge freezer, oven with 4 ring hob top, micro, fitted kitchen, air cons, water heater, sofa bed, twin beds, black out curtains, towels, pics, ugs, etc etc etc.
I would recommend researching and getting other buyers to recommend people they have used. I was going to get elecs from A, sofa from B, kitchen from C etc but in the end didnt want all the hassle and if anything goes wrong or breaks you just have the one contact to go back to.
Good luck.