I have used genieimaging, they were good. More recently I have used "The Darkroom UK Ltd" who charge 4.50 for processing only. This price includes VAT and postage both ways so the cost is comparable to Genie when you add these elements in. The last 3 films I've developed myself which is cheaper again. Once I have the slides or negs they get scanned on an Epson V700 - expensive to buy but I wish I had got is sooner to cut out the costs of scanning by labs sooner.

Labs often quote a price for scanning which is only for a fairly low resolution and the cost spirals once you go to a higher resolution. Scanning at 3200 dpi with a 6*7 negative results in an image file around 56mp which is easily achievable with the v700.