Former Post Office executive says he should not have said Horizon was robust

David Miller, then chief operating officer, tells inquiry he does not remember 1999 meeting in which comment was made

A former Post Office executive has told a public inquiry that he should not have said" to its board that the Horizon IT system was robust and fit for purpose" and agreed there had been a missed opportunity" to investigate post office operators' concerns.

David Miller, who retired in 2006 as chief operating officer of Post Office, had been told of problems with Horizon when he held meetings with post office operators in June 1999, the inquiry into the scandal has heard.