The new note by the government reveals plans to join the EU’s Interbus agreement.
This means that, when no longer a member of the EU, coach operators such as tours and holiday providers can still carry out a number of services.
They may be limited, but it will allow travel to still carry on when travelling by road.
If this is not agreed upon by the March 2019, when the UK leaves the EU, it could put all journeys between the UK and EU by coach on hold.
The government document warns there is a “greater risk of UK operators being unable to run regular services into the EU”.