The cost of filling up at the pumps has edged up over the last month, with diesel drivers getting a worse deal than those using petrol, according to figures from the AA.
The average price of petrol in the UK has risen from 133.35p a litre in mid-May to 134.61p in mid-June, while diesel has gone up from 138.17p a litre to 139.16p.
Northern Ireland has the most expensive petrol, at an average of 135.8p a litre, with London having the cheapest, at 134.61p.
Northern Ireland also has the dearest diesel (139.8p a litre) with London and south west England having the least expensive (139.1p).
The AA said the slight rise in average petrol prices nationally represented "something of a lull" after the 8-10p swings in prices over the last 12 months.