Be gentle 1st post.
Filled the car with Momentum99 £6 worth to try it out. Then look at the receipt to find out that it was the same price as Unleaded95. Not all petrol stations sell it at the same price so check the pump pricing before filling.
@ Osterley and Twickenham that I've seen so far.http://www.tesco.com/momentum99/
Try this website for the cheapest £ in your area.http://www.petrolprices.com/