The war in Iran and the effective closure of the Strait of Hormuz - through which around 20% of the world's oil and natural gas flows - has seen fuel costs rise sharply in the past month. With the disruption expected to have a lasting impact on prices, governments around the world have begun introducing measures to limit the impact on consumers and the economy. Here is a rundown of what's been introduced so far. While most of the UK's electricity is generated through natural gas and renewables, petrol prices have reached an 18-month high due to rising global oil prices, according to motoring organisation the RAC. The government has said it is primed to step in if there are signs petrol sellers are profiteering from the crisis - something the Petrol Retailers Association has denied is the case. Meanwhile, low-income households that use heating oil will be eligible to access a £53m package announced by the prime minister in March to help with costs.…