Blimey, thanks for the heads up 
4 out of my 5 bikes won’t take E10 so I just hope E5 will remain an albeit more expensive option for a while longer! 
These bastards want us to walk everywhere or go on the bus.
I hear that it’s already been introduced in Aussieland. No one bought it, even though it was cheaper. So it sort of went away.
It’ll be sold cheaper here as well but as we see things differently - which is why shite stuff sells here - it should do very well.
New vehicles will be fine, older stuff not so much.
Bigger jets required, using more fuel per mile as shown above. Running hot will also be an issue.
Given the amount of use of older stuff gets, if there’s a problem then buy the higher octane fuels, they’ll always be available if you spend the money (the Goodwood jolly chaps will have a source).
Stop buying the rubbish and it’ll go away.