Question to the Department for Transport:
To ask the Secretary of State for Transport, what proportion of traffic using the Port of Dover is commercial through traffic from the Republic of Ireland.
Information on the origin and route taken by vehicles using UK ferry ports is not held by the Department for Transport.
Data for 2017 indicates that 1.25 million powered Heavy Goods Vehicles (HGVs) travelled from the Port of Dover to Europe on roll-on roll-off ferries, of which 1% (15,000) were registered to the Republic of Ireland.