[Eddles]

I always accepted diesel was a few pence more expensive than unleaded and I came across 2 explanations that made sense. I was delighted to see the recent fuel price cuts driving diesel down to the same cost as petrol so I could pick diesel up at 100.9p per litre. However, going on holiday in Ireland, the best price for diesel is 102.9 cents per litre whereas petrol is 117.9 cents per litre. Changing to pence, its 90.2p per litre for diesel and 103.2p per litre for petrol. Northern Ireland has roughly the same prices as the rest of the UK. What is going on, why is diesel so expensive in the UK compared to petrol considering Irish diesel is the same stuff as UK diesel?