Some train passengers could face season ticket fare rises of more than 5% under new year increases expected to be announced tomorrow.
Recent Government announcements have meant the annual rise in regulated fares, including season tickets, will not be so severe for 2014.
But the new price-rise formula, which will kick in on January 2, still allows for average regulated fare increases of 3.1%. And train companies can use a 2.0% "flex" regulation which lets them put some regulated fares up by 5.1% as long as their overall average does not exceed 3.1%.
The increase for any January is calculated from the RPI rate of inflation figure for the previous July. In July this year the RPI figure was 3.1%.