Karen's Test

Some rail fares in England will rise by 6.2% in January – about double the rate of inflation – although other price rises may be higher.

The Retail Prices Index (RPI) measure of inflation in July – which stood at 3.2% – is used to calculate the rises.

Some English fares will rise by RPI plus 3%, while in Scotland they will go up by RPI plus 1%. Wales has yet to set a figure for its increase.

The extra money is helping to fund huge investment across the network.