Tesco has warned its full-year profits will be substantially below market expectations.
The supermarket chain said its group trading profit for the full financial year "will not exceed £1.4bn", below the £1.8bn to £2.2bn range expected by markets.
The downgraded guidance follows its admission earlier this year that it had misstated its profits by £263m.
Its shares plunged 16% following the unscheduled trading update.
The firm said it had implemented new policies and procedures since the accounting problems came to light, and its new approach would "ensure that revenue recognition is transparent and appropriate".
Tesco owns the Dobbies chain of garden centres.
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