I cannot find a single garage around me that is under the £1.
In fact the cheapest I have found is 102.9 5 miles away but most are 103.9+.
Never mind.
One thing I always found hard to understand was when I lived in Milford Haven, South Wales our petrol prices were higher than areas 100miles away and all the fuel they sold was transferred from the Milford refineries.. The further they travelled the less you paid.