Size of the bag on offer?

180g for roulette ones the tangy cheese, cool, lightly salted, hint of lime and chilli heatwave ones are 200g.

Some of the 200g varieties eligible for 30p cashback on Shopitize

good find op, heat added

The dips also £1

http://www.tesco.com/groceries/product/search/default.aspx?searchBox=doritos&newSort=true&search=Search

This is what the usual price should be.

4 for £3 mix and match Doritos and dips in Morrisons.

This is a routine offer from Tesco, happens every 6 or so weeks. As a side note Iceland always sell them for £1 as well some H&M and the like.

same at co-op + 10% nus

Yeah, you can stick them to their close to improve the way they look....and taste.

​I'm meant b&h bargains...although I wouldn't mind if h&m sold them

I am sure shops have just doubled the prices of many things so they can put them on offer at the price they should always be.
Pringles are another product that now has a ridiculous rrp and is forever on sale half price for about £1.30.