Received an email today for bt sim only deals for existing broadband customers.
Unlimited mins, texts and 12gb of data for £12 a month,12 months contract plus an amazon or iTunes gift card for £70
This is £4 a month cheaper than the current deal but not live yet so probably starting in the next few days
Can also be used with the family sim
Not sure if quidco or topcashback will track with this but after the gift card taken into account works out at £7 a month for unlimited texts mins and 12 gb of data