The figures released today show Britain had the cheapest diesel last month - at 48.8p per litre - excluding tax and duty, among 15 leading EU countries including Germany, France, Spain, Ireland, Italy, Portugal and Sweden. But once taxes were added, the pump price became the most expensive in the EU at £1.17 - and has since risen. In the wider EU, only Bulgaria had cheaper diesel before tax at 48.6p a litre. The tax component in Britain was the highest in the EU at 58 per cent.