evidence: In late October 2018, the National Audit Office claimed that it was already too late to prepare the necessary Irish border security checks in the event of a No-deal scenario—a weakness that could be exploited by criminals.[318] [...] - ^ Irish warn Theresa May: change course or risk Brexit chaos The Observer. 25 November 2017. - ^ Rob Merrick (24 October 2018). "It's too late to prepare UK borders for no deal Brexit National Audit Office tells Theresa May". The Independent. Archived from the original on 7 May 2022.