LONDON, March 17, 2026, 19:49 GMT UK petrol prices rose again on Tuesday, opening a near-49 pence-a-litre gap between one of the priciest motorway stops on the M1 and the cheapest station listed in London, as conflict-linked supply fears kept crude above $100 a barrel. RAC data showed average unleaded at 142.29p a litre and diesel at 162.06p, while checks by the Guardian and Secret London pointed to a spread from 172.9p on the M1 to 123.9p in Camden. (RAC Media Centre) The widening gap matters now because drivers are dealing with two shocks at once: national prices are still