Israel's strikes on Iran, and Iran's response, caused a shudder on global financial markets on Friday.
The price of oil surged in particular, up 7% by mid-afternoon on Friday.
That has prompted worries that we could be facing another period of sharply higher energy prices, leading to a bout of higher prices for everything from petrol and food to holidays.
That is what happened after Russia invaded Ukraine three years ago, affecting people's lives around the globe.
The attacks prompted an instant reaction on the markets.
