Train journeys on Govia Thameslink were down 80% from March last year due to the pandemic.
It is as train usage across Britain fell to its lowest levels since 1872 when records began.
Despite the drop, recent estimates by the Department for Transport show journeys by train have recovered to around 45% of pre-covid levels.
Graham Richards, Director of Planning and Performance at the Office of Rail and Road, said:
“This unprecedented fall in passenger numbers, the lowest annual fall since the time series began, has clearly had an impact on both rail usage and ticketing revenue.
“Despite this, recent estimates published by the Department for Transport show that rail usage has recovered to around 45% of pre-COVID levels by the end of May 2021.
“ORR continues to work closely to support industry and help passengers back on to the railway safely.”
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