Peak-time fares for rail passengers will increase by 2.5% in January, with off-peak fares frozen at 2013 prices.

ScotRail said fares for four out of ten journeys would not increase while peak-time increases would be limited to inflation.

The annual fares increase is calculated using the July Retail Prices Index (RPI) rate of 2.5%.

Fares in England and Wales are calculated by RPI plus 1%, meaning an average increase of 3.5% for customers there.

Companies south of the border are also able to raise some fares by 2% above RPI.

Transport minister Keith Brown said the average rise in Scottish rail fares would be 1.9% as a result of a cap negotiated by the Scottish Government.

He said: "I have negotiated an agreement with ScotRail which means their peak fares will only increase by 2.5%, rather than up to 5.5% in England and Wales.

"The next ScotRail franchise will bear down further on the cost of fares, ensuring they will not rise above inflation, and it will be a condition of the next franchise that regulated off-peak fares will be restricted to 1% below inflation from 2016.

"From January 2016 regulated ScotRail fare increases can be no higher than RPI and off-peak regulated fare increases will be capped at 1% below RPI."