Decision made! I signed up for the BT 38mb Infinity product via Quidco, just in time to be eligible for a £60 cash-back. So half price for 3 months, £25 Sainsburys voucher and now £60 pay back. Happy enough

Install date is 13 August which is fine with me, so once that's done, it will just be a case of keeping an eye on Quidco and my cash-back.

Thanks for all your help

Steve