Moy,
Cake flour is milled from a softer wheat and is also treated to have a lower protein level. Lower protein level results in less gluten development. It also has a significantly finer granulation. (finer sifting)

You'd be much better advised to buy "sponge flour"
You can buy Sainsbury's "Taste the Difference Extra Fine Sponge Flour" on special offer right now
Look here:-
http://www.mysupermarket.co.uk/#/sai...flour_1kg.html
i think you have read my mind on that links..as actually before ive log in here i been lookin on that links youve just given
btw thanks in many as usual Terpe