OK Neil, this is how I would do it, and what I would personally use (if anyone can suggest a better suited product for any stage, please feel free)
2 bucket method (so 2 buckets) £10?
Hosecoil Suds Blaster Pro Soap & Rinse Nozzle £19
Snow Foam + Chemical Guys Maxi Suds II for pre wash (£12 for 5 litre snow foam and £6 for a bottle of Maxi Suds)
Chemical Guys Citrus Wash and Gloss to wash the car with (£7)
Wash ScMitt to wash the car with (£9)
Sonus Ultimate Drying Towel (£11)
Megs quick detailer to aid with drying (£8)
Polish wise, I currently use Meguiars stage 2 once a quarter, but if someone can recommend something else, please do so (£7)
Wax, I'm only going to be using the Poorboys Nattys Paste Wax blue, as this is recommended for darker paint (£13)
Polish and Wax applied with Foam Wax Applicator pad (£1 each)
All buffed off with a Microfibre cloth
Wheels
Waxed with Chemical Guys Wheel sealant (£12)
I'm sure I've missed something, so please feel free to add.