In Jacindaland dollars that is $3.35 at the present exchange rate. A breakdown of the present UK petrol and diesel prices is given here. Intriguingly it states that the Retail Margin (forecourt costs & profit) on petrol is -4.31 pence a litre on petrol, but +6.24 pence on diesel.
This must be for 95 octane as this list giving prices for 95 throughout Europe in EUR is pretty much that. Where is it cheapest by far? Russia of course.