Mobile phone Batteries http://www.1001mobiles.co.uk/ They give a proper address and phone number, reasonable prices very fast service.
Digital Cameras: http://www.buyacamera.co.uk/ Address, proper phone number, phone ordering, 2 YEAR guarantee reasonable prices.
Inkjet cartridges: http://www.box-shift.co.uk/cgi-bin/home.asp some of the best prices around and a very wide range of products. Have proper address and phone ordering (free 0800 phone number.)
Scan Computers http://www.scan.co.uk/ I have found these people very good, low prices, excellent service and a really huge range of computers and bits.
Cameras: Fuji Finpix E550 6 Mpx, not the very latest, but I reckon a really good all round camera, small enough for a belt pouch but good enough for pretty much any none specialized job. (Note, the E550 can run on alkaline AA size batteries which can be very handy if for some reason charging is awkward.) Olympus C 8080WZ, 8 Mpx, tons of features for the money, very good on battery life. Capable of professional quality results.
Computer bits: http://www.cclonline.com/ Proper address & phone, phone ordering reasonable prices, fast service, wide product range, trade account available if you are VAT registered.
Car insurance & breakdown cover: Tesco have consistently offered me lower quotes than any one else. http://www.tesco-car-insurance.co.uk/ extra 10% discount if you register on-line.