I visited Tesco in Sunbury this morning to stock up on some bargain deals I found out about on Hotukdeals. I couldn't find the chocolates I was after but I stumbled across and uber bargain in the shape of a box of Green & Black chocolates. The ticket on the shelf said they are reduced from £3.99 to 99p and that's what they went through the till at. I checked online and it's not on the website so this looks like an instore offer, perhaps it's store specific I don't know. They weren't in the seasonal aisle but in the aisle with all the ordinary chocolates. There were a lot left when I got mine.
It is an assortment box called "The assortment", they come in a green box and there are 18 pieces. They are extremely tasty so I recommend you go out and hunt some down for your own pleasure!
The image I've attached shows the correct box of chocolates on the top left.