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,