The EU have stated that agreement about Ireland must be reached first, before any trade talks. If the govt are serious about not wanting to see the return of a "hard border" or militarised frontier around the UK, it will be interesting what they come up with.
It has been estimated that there are 275 road crossings bisecting the 500km long partition line, that figure is almost certainly a conservative one if smaller tracks, greenways and private routes are included. In contrast to Ireland, there are only 137 crossing points situated on the whole of the EU's eastern frontier, a multinational border which stretches for over 6,000kms.