It got more and more difficult for Johnson as the morning went on. As
@lemonjelly says above there was an awful lot of I can't remembers in his answers. He got a bit flippant at one point accusing KC Keith of accusing him of having his feet up on holiday during the February half term period which he then had to apologise for when proven that this wasn't the case. He was then took apart on the said period as Keith questioned him on his responses to red box papers, minutes etc and all he could muster was that he couldn't remember. All the accusations of him in general about not being over his brief as PM are being laid out for all to see.