Was just in the Tesco Metro in Wimbledon and they had loads of Starbucks Via 3 packs marked "Reduced to sell" for 69p. They only had the Italian Roast (both regular and decaf) These are normally £1.39.
This makes 12 cost just £2.76, and I believe it is nearly £5 if you buy a 12 pack in a Starbucks store.
Not sure if this is nationwide, the website still shows them costing £1.39.
This is my first post, be kind.