Acoba could suggest she take up to two years gardening leave before starting the job.

Source: https://www.independent.co.uk/news/uk/politics/boris-johnson-news-partygate-lockdown-b2293591.html

Government figures had lobbied Acoba to impose a waiting period of 12 months after complaints about Ms Gray’s move to join the Labour leader after leading a high-profile investigation into Boris Johnson over lockdown breaches in No 10.

Source: https://www.redditchadvertiser.co.uk/news/national/23629050.whitehall-probe-finds-sue-gray-broke-civil-service-rules-labour-job-talks/?ref=rss

However, Acoba said Mr Johnson only informed them half an hour before the public announcement.

Source: https://www.independent.co.uk/news/uk/politics/boris-johnson-new-job-report-latest-news-b2359403.html