Hi Trevor,
The Astra seems happier on the old E5, but will see how it goes this week, as was only able to get the E10 today. And as it was quite low due to having the fuel shortage, beggars cant be choosers.
I always believed that supermarkets got their fuel from the main suppliers, i.e., BP, Esso, and Shell, and it was just transported in the supermarkets own vehicles. Had to use Tesco today as our BP has not had any fuel for about a week.
Glad that your Harley is ok with it, nice to know that you haven't got to spend on changing pipes and seals to keep it going, and you can get out and enjoy.