Not sure on current price, but was always the same as here round about 35-40 ish a litre. The only difference is it's white. So it goes in the car as well.
Last weekend at warsash 39p/litre. 100 litres or more 37p litre. The price went down in increments depending on quantity. I remember not too many years ago when 19p / litre was expensive in the solent,