I went into Clinton Cards in Lowestoft and they had these by the door. **Large & Small Red Shopping Bags** with 90% off sign.
I picked up 1 of each; and they both scanned at 99p.
->Small bags RRP £8.00.
->Large Bags RRP £12.00.
I purchased the large one and the girl behind the counter said they had an email to reduce these so hopefully its nationwide.