He recently revealed how he and David Walliams would be taking a different approach for their new comedy project.
"That is something we should have done but didn’t do back then."
Fremantle said it was "sincerely sorry" for the "distress" caused to David Walliams after recordings of his "private conversations" were published in the media.
The comedian left the panel after recordings of him making disparaging and explicit comments about auditionees were shared with the press.
Simon Cowell Breaks Silence On David Walliams' 'Completely Unacceptable' Comments That Led To BGT Exit
The TV mogul said comments made by his former colleague about past contestants on the ITV talent show were "upsetting".
Bruno Tonioli Reveals 'Classy' Gesture David Walliams Made After Replacing Him On Britain's Got Talent
The former Strictly Come Dancing judge will appear in David's old seat on the panel when the ITV talent show returns at the weekend.
David's departure came weeks after recordings of him making explicit and disparaging remarks about BGT auditionees were leaked.
The comic will not be returning to the BGT panel after recordings of him making explicit and disparaging remarks about auditionees were leaked in the press.
Bruno Tonioli is the newest addition to the BGT team, taking over the spot previously occupied by David Walliams.
Britain's Got Talent unveiled a new member of the panel on the first day of auditions this week.