Try the chinese supermarket if you can..
.. I use Wai Yee Hong's in Bristol (near Ikea) and they do packet noodles for 25p but with powdered seasoning, separate chilli sachet, sachet of soy sauce, little sachet of dried onions and a sachet of flavouring oil. Loads more flavoursome than Adsa ones and lots more flavours to choose from.
Does the recipe above (noodles in cup-a-soup) remind anyone else of the lifestyle recipe tips from Lee and Herring's Fist of Fun?