"Inland border facilities were introduced to deal with customs checks at the border post-Brexit, and are constantly under review to ensure they provide value for money. A new proposed site at Dover was part of that review and, after looking into the amount of cross-channel traffic and the necessary associated checks, a decision was made in June 2022 not to progress that site.
"That decision to not build the inland border facility, however, does not mean that that asset is not required by the Government. The Department for Transport is exploring alternative options for its development to ease pressure at the border, given the issues with disruption on the strategic road network in Kent and at the ports. The Department for Transport will continue to engage with my hon. Friend the Member for Dover, local leaders, businesses and residents to ensure that any development will also benefit the local economy and the community."
Parliamentary Secretary, Cabinet Office
https://hansard.parliament.uk/Commons/2022-10-18/debates/6f70b92e-3851-4646-b47e-46f04e8eba0c/details