Popped into my local Tesco (Ponders End) and they had the sharing bags for celebrations and Quality street down to £1.50. The dates on the celebrations were the end of April 2017 and for the Quality Street went to August 2017. A's someone else mentioned the Celebration's deal it could be national. Was also advertised as being £3.50 in seasonal aisle but scanned at £1.50.
Sharing bags-550g Quality Street and 490g Celebrations at Tescos only £1.50