Any attempt by the EU to treat Northern Ireland differently to the rest of the UK will be resisted by the Government and rejected outright by the DUP, Theresa May's allies in Northern Ireland.
The UK's preferred options for an open border controlled under a free trade agreement and using technology will not be set out in the draft treaty.
The DUP, Mrs May's Northern Irish allies in Westminster, are likely to react with horror at what will be seen as a renewed attempt to ensnare Northern Ireland after Brexit.
Both London and Dublin have repeatedly insisted they want an open border in Ireland after Brexit but the two sides are far apart on how to achieve it.
The former top civil servant in Liam Fox's department has warned quitting the EU is like swapping a three-course meal for a packet of crisps.This would mean Northern Ireland could accept the rules of the customs union, single market and continue to be bound by EU courts after Brexit - even while the rest of the UK is not.The dispute has been intensified by Jeremy Corbyn's decision to endorse membership of a customs union with the EU after Brexit - encouraging Brussels to think it can force the issue.that we want a different solution.' Mr Johnson compared the Irish border to the lines between London boroughs - pointing to the use of camera technology to impose the congestion charge on drivers.'We think that we can have very efficient facilitation systems to make sure that there's no need for a hard border, excessive checks at the frontier between Northern Ireland and the Republic,' he told BBC Radio 4's Today programme.'For people listening, there's no border between Camden and Westminster, but when I was mayor of London we anaesthetically and invisibly took hundreds of millions of pounds from the accounts of people travelling between those two boroughs without any need for border checks whatever.' Labour ridiculed Mr Johnson for comparing connections between London boroughs to the Irish border.Backbencher Chris Leslie said the Foreign Secretary had shown he 'simply doesn't understand' the issue.The incendiary leak comes after Boris Johnson triggered a new row over the border by comparing it to London's congestion charge zone.Downing Street played down the Foreign Secretary's suggestion, insisting he was not proposing a specific technical solution to the conflicting demands for the only UK-EU land border.Mr Johnson said he disagreed 'very strongly' with Sir Martin 'of the Brussels commission', arguing that there is an 'insatiable' market for UK services outside the EU.He rejected reports that the EU is set to demand the European Court of Justice is the ultimate arbiter in treaty-related disputes as it would not amount to 'taking back control'.The Irish border is one of the trickiest questions abound up in the Brexit negotiations.Currently the UK and Ireland are both in the EU so there is freedom of movement and goods and no hard border there - which help to underpin the Good Friday Agreement which brokered peace.