Mm, I have to say I'm impressed by this:
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/833286/what-haulier-drivers-should-do-moving-goods-through-rollon-rolloff-roro-locations-eu-to-uk.pdf
and this from KCC dated 12 September:
KCC has consistently argued that that Customs Stations for border readiness should be situated predominantly outside of Kent, to minimise disruption on the Kent road network and avoid the risk of freight in transit arriving at Kent ports without suitable customs paperwork, being turned away and drivers then having to search for the Customs Stations in Kent. However... government is currently consulting on Special Development Orders’ for sites at Ashford Truckstop and car park D at Ebbsfleet International railway station. Opportunities may also exist for temporary Customs Stations/Services to be set up across the motorway network outside of Kent. This would enable the checks on the border readiness of freight.
but not at all by this:
KCC’s Trading Standards team inspect goods crossing the UK border in Kent, and their new Ports Team based near the Port of Dover, comprising of five Port Import Compliance officers, was in place in March 2019. This was in response to a predicted increase in referrals. In the first quarter of 2019/20 the team dealt with a similar number of referrals to that of the entire 2018 period.