Rail companies including Virgin Trains and Greater Anglia will allow passengers to buy on the day reserved tickets up to 10 minutes before departure time, according to the Rail Delivery Group (RDG).
The group, which represents train operators, announced today that customers of Grand Central, Greater Anglia, TransPennine Express, Northern, Virgin Trains East Coast and Virgin Trains West Coast, as well as the Caledonian Sleeper, will be able to buy advance tickets for many trains on the day of travel.
The scheme was first tried by CrossCountry with a batch of train firms following suit.
The RDG said passengers who have to take long journeys at short notice are benefiting as "millions of cheaper train fares go on sale for longer", as people needing to book urgent train journeys for family or business reasons had previously lost out.
Until now, advance tickets had been available to buy generally only until midnight the day before travel.
Jacqueline Starr, managing director of customer experience at the RDG, said:
Not everyone can plan journeys in advance and now more people can buy cheaper tickets on the day, even on their way to the station.
We want customers to get the best possible deal whenever they travel.
With 97 per cent of your fare going back into running and improving the railway, investment is driving quicker improvement, more choice and greater freedom.
The RDG said the advance purchase on the day tickets were particularly suited to long-distance journeys, while best value for customers of other operators was offered by other types of tickets, such as off-peak fares.