The NCA is investigating criminal offences relating to electoral law on the behalf of Brexit supporting campaigners.
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This is serious enough to warrant a view that the 2016 referendum result should be questioned.
Therefore the process should be adjourned while the facts and position are investigated.
http://www.nationalcrimeagency.gov.uk/news/1498-nca-initiates-investigation-following-electoral-commission-referral
https://www.electoralcommission.org.uk/our-work/roles-and-responsibilities/our-role-as-regulator-of-political-party-finances/sanctions/report-on-investigation-into-payments-made-to-better-for-the-country-and-leave.eu