Oil prices are falling after trading drops below $100 a barrel for a sustained period, according to reports. Both outlets link the decline to expectations that a peace deal involving Iran could be progressing. The lower crude prices are already feeding through to fuel costs for drivers in the UK. One reported indicator is that the average price of a litre of petrol has fallen by 3p, with the change attributed to the period of crude oil trading under $100. The articles also frame the question of timing and magnitude of further fuel-price movements, suggesting that any additional reductions would depend on how long crude remains below that level and how quickly retail prices adjust. While the reports focus on petrol, they imply that diesel prices could also be affected as the crude oil decline continues. Overall, the coverage centers on the relationship between crude oil market movements tied to Iran-related peace expectations and near-term changes at the pump.