Go-Ahead's shares tumbled 22% by 0925 GMT, as it once again pushed back the release of its financial results for the year ended July 3, 2021. As a result, its stock will be suspended from Jan. 4, although the results are expected to be published before January-end.

Britain in October seized control of Go-Ahead's Southeastern rail contract after the transport company admitted to financial errors and repaid 25 million pounds ($33.01 million) to the government.

Go-Ahead said the Department For Transport (DfT) could impose a fine on the company. Go-Ahead and its auditor are considering including a provision for the potential penalty in its 2021 financial statements.

($1 = 0.7574 pounds)

(Reporting by Amna Karimi, Pushkala Aripaka and Yadarisa Shabong in Bengaluru; Editing by Devika Syamnath)