I've just had my insurance renewal from Footman James, and a follow up e mail link takes me to a very interesting discussion re the Governments proposed introduction of Ethanol E10 to fuel in order to assist with environmental reduction targets.
The questions, and discussion points, are as to how it will affect Classic cars, and their performance.
It suggests that there could be degradation in fuel lines and damage to internal parts of carburettors, and possible re jetting of certain types of carbs could be needed.
On a contrary observation, it suggests that performances and mpg may well be improved!!
It's quite a long article, but worth a read, so maybe someone more qualified than me can put up a link on here for further discussion.