Peter Fincham, ITV's Director of Television, said today that the Phillip Schofield incident was "something we shouldn't have done."
Speaking to ITV News UK Editor Lucy Manning, Mr Fincham said that Mr Schofield "realises his mistake, he apologised for it fully and extremely quickly."
"I think he's under no illusions that this was a lapse in ITV journalism," he said.
"In live television, all sorts of things can happen. That doesn't mean they should happen," he said, adding that he had received a letter from Lord McAlpine today to which ITV would respond "very quickly."
More top news
The significant development came after a forensic re-examination of a palm print left on a getaway vehicle.
Carla Lane was once one of the UK's highest paid screenwriters.
Politicians, royalty and the descendants of combatants in the Battle of Jutland commemorated the 8,648 seamen who died in the engagement.