Season ticket holders on Great Northern and Thameslink have until the end of the month to claim up to four weeks’ worth of fares as additional compensation following the disruption on the railways earlier this year.

Customers have to apply by November 30 after the fall-out from the timetable that was introduced in May.

Govia Thameslink Railway (GTR) is urging those travelling from the most affected stations between 20 May and 28 July to visit to see if they qualify and make a claim by the end of November.

On Tuesday 26 November, GTR plans to open the scheme to regular travellers, such as part-time workers, who did not have a season ticket during the disruption. Passengers who made a minimum of three days’ return travel in any one week could qualify.

Those who do not have their tickets from the qualifying period can provide other proof of travel.

GTR says reliability and frequency of services on Thameslink and Great Northern has improved since May, with more than eight out of 10 trains arriving on time, and 200 additional services in operation.

Chief executive officer Patrick Verwer said: “I would urge affected season ticket holders to claim through our website while the scheme is still open.”