Does anyone else remember Echo? I think that this particular packaging design is from quite late on in the UK production of Echo - 1980's? Possibly not long before it stopped being available in the UK?
Vintage adverts for Echo still pop up on Ebay from time to time such as HERE.
Seem to remember it was quite popular for making sponge cake with...?
A small example of a piece of domestic history which disappears from memory without you realising that it has gone.