The Sainsbury's Gift Cards over at BT had dropped in value by £25 to £50 on ADSL2+ products and £100 on Infinity and are available for new customers ordering before the end of 13th August 2015.
A number of the offers have also changed and some are now only available by following the affiliate links rather than going direct to the BT website e.g. the links below save you £5 per month on the unlimited Infinity 1 service.
Voice line rental via BT is required which is currently £16.99 per month, but will rise to £17.99 per month on 20th September 2015, a line rental saver option is available to reduce the cost by paying line rental in a lump sum.
Infinity 1 and Ultra HD package will not be available to all Infinity customers, but will require an estimated speed of 44 Mbps or faster and our understanding after some initial confusion is that while broadband speeds may be capped to Infinity 1 up to 38 Mbps speeds the line will usually be provisioned on the Openreach 80/20 service.