I've found several sites with meals for £1 per portion, but that only seems to include the ingredients (and often doesn't include the cost of things like spices, herbs, oils, flour, that you're supposed to keep in your store cupboard).
For instance, on the BBC website, there's a recipe for leek and cheese filo tart. But the cooking time is given as 30 minutes to 1 hour, including at least 25 minutes in the oven, which has to be pre-heated.
So are there any collections of recipes for meals that are cheap in terms of total cost of ingredients and cooking?