These all seem pretty good deals for £1if you buy them anyway:
Green & Blacks Organic Milk / Dark / Whole Almonds Chocolate, 100g
The Co-operative Garlic Baguette / Reduced Fat Garlic Baguette Twinpack (chilled)
Rustlers Fiery Beef / Zingy Chicken Burger 131g-182g (chilled)
Ribena 100% Juice, 1 litre
Cadbur'y Dairy Milk, 5 pack
Burton's Jammie Dodgers Snack Bar / Maryland Munch Bars Choc Chip
Ginster's 2 Pack Sausage Rolls
Vale Of Mowbray Family Pork Pie
Weight Watchers 6 Almond / Lemon / Carrot Cake Slices
Weight Watchers 6 Chocolate Mini Rolls
Cadbury's Giant Buttons / Chocolate Eclairs / Shots Bag 175g / 200g
Nestle Kit Kat 2 Finger 9 pack
The Co-operativeChocolate Profiteroles
McVities Galaxy / Hob Nob / Chocolate Flapjack/Caramel Shortcake Slice/ Cadbury's Caramel Cake Bar 5s / 6s
McVities Mini Milk Chocolate Digestives / Choc Chip Cookies 6 x 25g
The Green & Blacks Organic Chocolate is way cheaper than Tesco and Asda who both have these at £1.77.
I don't know whether it is nationwide, but my local Co-ops also have medium free range eggs on an offer of 9 for the price of 6 at £1.36, which again seems a good deal..
They also have various BOGOF and half price offers. The link is for a regional Coop, but it seems like they apply to most of England at least.