If you put your Boots reward card into one of those in-store reward card machines, you can print off a voucher for 200 points when you use the Boots digital photo processing 1/24 hours or 3 day service. If you get ten 6x4 photos, thats 20p x 10 = £2 which is equivalent to the points that you will receive. I've printed off a few of these vouchers to use.
T&C's on the voucher:
200 points on the Boots digital photo processing service. Offer applies to the 1/24 or 3 day digital processing service. Minimum order of 10 digital photographs. Offer excludes the Kodak instant photo kiosk.