Already posted from Asda but Sainsburys have now matched a 9p per 500g bag price for pasta. The difference is that the Sainsburys stuff is 100% durum wheat, so doesn't go as mushy as the Asda/Tesco stuff, which has soft wheat flour to bulk it out.
It also means you can make a super-cheap snack: -
100g Sainsburys Pasta with one mug of boiling water.
Microwave for 1 min then cover until pasta is soft.
Drain and put anything you want on it - a small bit of butter with some garlic and pepper is a cheap and easy one.
Bon appetit - a filling snack for less than 5p!