The Department for Transport are responsible for monitoring the movement of goods across the UK border. This information is not centrally available.
UKBA conducts freight searching operations at each of the Juxtaposed locations in Northern France, as well as ports of entry around the country. Drivers and their passengers are required to present documentation in the form of either a passport, or an ID card to an immigration officer to verify their identity and this applies to everyone seeking entry to the UK without exception.
Once the immigration officer is satisfied with the passenger they are allowed to proceed to the freight search area where their vehicle may be subject to further checks relating to their load as well as a physical search of the vehicle by trained search teams.