Commuters could save hundreds of pounds with new weekly caps on their rail fares.

People who regularly travel on Southern and Thameslink services will now benefit from the cheapest possible tickets - with those travelling the most often even getting free journeys.

The country's largest rail operator - GTR - announced the scheme in a bid to get commuters back into the workplace.

Passengers who might not know how many days they have in the office each week will now only pay the equivalent of a weekly season ticket, if that is the cheapest deal to them.

This means passengers between Brighton and London Victoria could save almost £125 every week.

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The service is available on the Key smartcard which also generates an automatic notification when your delayed train entitles you to compensation.

Mark Pavlides, interim chief customer officer at Govia Thameslink Railway, said: “Our simple tap-in, tap-out, pay-as-you-go keyGo system already guarantees our customers the cheapest walk-up fare of the day with none of the hassle of buying a ticket.

“The additional promise to never charge more than a weekly season ticket for travel between the same two stations means thousands of commuters returning to the office will never miss out on weekly season ticket deals, saving hundreds of pounds a week or month.

Approximately 30,000 customers already on the keyGo scheme immediately qualify. For new passengers, they must register online for a GTR Key Smartcard, sign up to use the keyGo service and take a minimum of four same-route journeys within the week.

Customers will only be charged up to the value of the best value weekly season ticket for their selected route and will be notified when their journeys reach the cap.

Any further journeys made on their chosen route will be at no further cost, meaning that once the weekly cap is reached, regular rail-goers will be able to travel for free.