She did have time to dispute the twice-repeated lie, but to be fair to her, when confronted with a bare-faced lie, it takes huge confidence and presence of mind to challenge it. It would be easy to end up on the back foot, wondering if you had missed such a change, when Bryson was a very clear example that (in Scotland at least) no such amendment to the rules has occurred.
My previous comment was perhaps unfair. Outright lies, presented confidently, are very difficult to challenge. Those willing to lie can, unfortunately, sway entire debates and it is a pity this one was not pointed out as it might well make a difference to how people judge the situation.