Finance Act 1975

31 (1) If after any account, information or document has been delivered, furnished or produced by any person without fraud or negligence it comes to his notice that it was incorrect in any material respect it shall be treated for the purposes of paragraph 30 above as having been negligently delivered, furnished or produced unless the error is remedied without unreasonable delay.

(2) If after any account, information or document has been delivered, furnished or produced by any person in pursuance of this Schedule it comes to the notice of any other person that it contains an error whereby tax for which that other person is liable has been or might be underpaid, that other person shall inform the Board of the error ; and if he fails to do so without unreasonable delay he shall be liable to the penalty to which he would be liable under paragraph 30 above if the account, information or document had been delivered, furnished or produced by him and the case were one of negligence.