UK average diesel prices drop sharply over June, reaching 167.14p per litre by the end of the month, down from 183.75p at the beginning of June. The reduction is 16.6p per litre, which both outlets describe as the biggest monthly fall since diesel price tracking began. The articles link the decline to lower oil prices during the month, citing easing geopolitical tensions with Iran as one contributing factor. Taken together, the reports indicate that the diesel market experiences rapid pricing pressure as global crude benchmarks move. By late June, the scale of the decrease marks a record for the period covered by available data. The coverage focuses on the month-to-month change in the UK average diesel pump price, rather than on specific retailer behaviour or regional differences. Both sources present the same figures for the start-of-month and end-of-month averages and agree on the record-setting nature of the decline.