All I can find is deals, as in PAYG with extras - if you top up £10 a month. The whole reason I want PAYG is because I will be spending less than £10 a month.

The only place that actually tells you the cost of calls, texts and data seems to be Vodafone. All the rest say free this that and the other if you top up £10 a month. (You mayaswell be on a contract?) They seem to hide the actual costs if you don't top up £10 per month, at least I can't find them! I've checked out O2, Orange, Tmobile, Virgin, Three and Talkmobile. I don't need a phone, just the sim and I can't find the charges on any of the sites!

When you are looking at one of the 'deals', there is always a link nearby to click to see the out of allowance cost.

For example, day you were looking at the O2 Text and Web tariff, just underneath is a link "See Call costs and Terms"

If you are a very light user then something like Tesco value, giffgaff or Asda is the best bet.

This is from the Giff Gaff site

http://giffgaff.com/compare-pay-as-you-go-tariffs

It doesn't mention Asda or Tescos ect though, only the main players