UKpia Statistical Review 2011

This United Kingdom Petroleum Industry Association publication provides information on petrol and diesel prices (sections 6 and 7 respectively) and details the decline in the number of petrol filling stations from 37500 in 1970 to 8787 in 2010. It shows that, whilst the majority of petrol filling stations are still independently owned, the number of independent and oil company filling stations has been falling whilst the number of  supermarket filling stations has increased.

UKPIA Statistics Review