NO, that's NOT what is happening. Boris had his chance and schedule for Brexit, according to the UK Referendum, on October 31. It was Johnson who requested an extension from the EU to January 31, to hold his election. The EU granted it. As far as the EU is concerned, the UK is still a full member of the EU with all rights and obligations. The EU and the UK reached a provisional agreement in March 2018. It includes a transition period until 31 December 2020 in which ALL EU rules continue to apply. It also covers the border between Ireland and Northern Ireland.
On January 31, 2020, the UK leaves membership of the EU.
As of 1st February 2020 it will no longer be a member of the EU.
THAT is Brexit.
Right now, until January 31, the UK is a member with all rights and obligations.
From 1 February it is OUT of the eu and it still retains trading rights etc. until Dec 31, 2020 or earlier if a trade deal is met. The UK will also conduct formal trade talks with the US, etc.
but it goes back to what you, PGR88, define as “reasonable Brexit”. So I ask you once more (4th time) what is YOUR definition of “reasonable Brexit”