Re: Any chance
> you want him sacked because it may have infringed some guidance
No. One wants him to be relieved of giving advice to  the Prime Minister, because of a demonstrable failure of judgement. He didn't say he "[went] for a drive with his family", because of what the PR people call 'optics'. Maybe that's why he ascribed the outing to being an eye test. <sfx>rimshot</sfx>. So, that's either a lie, or a demonstrable failure of judgement: "Jeez, I don't think I can see well enough to drive. Let's load up the wife and bairn, and take a trip to Barnard Castle to find out".
 Or operating the PM with his hand up Mr Johnson's back, depending on who you believe.