In his Round 4 closing statement, Mr Davis referred to publication of an updated table showing many areas of agreement. For this see Department for Exiting the EU - Joint Technical Note
The Florence Speech was notable
for statements that the UK will leave the EU on 29th March 2019 and will not be a member of either the Single Market or the Customs Union. Mrs May also ruled out membership of the European Economic Area (EEA). Nevertheless, both the UK and the EU would benefit from a period to "adjust to the new arrangements in a smooth and orderly way" and a "strictly time-limited period" of around 2 years ought to apply. Such a transition period could be agreed under Article 50 and the framework for the period would be the "existing structure of EU rules and regulations." In the practical world, such a period of adjustment makes complete sense but it will not be to the liking of some politicians.
Article 50(3) tells us when the Treaties will cease to apply and it is either the date of entry into force of the withdrawal agreement or, failing that, two years after the notification. The European Council, acting unanimously, is empowered to extend this period.
Negotiating guidelines on the Brexit withdrawal agreement issued by the European Council (EU27 States’ leaders) state: "To the extent necessary and legally possible, the negotiations may also seek to determine transitional arrangements which are in the interest of the Union and, as appropriate, to provide for bridges towards the foreseeable framework for the future relationship in the light of the progress made. Any such transitional arrangements must be clearly defined, limited in time, and subject to effective enforcement mechanisms. Should a time-limited prolongation of Union acquis be considered, this would require existing Union regulatory, budgetary, supervisory, judiciary and enforcement instruments and structures to apply."
It therefore remains to be seen precisely what is agreed regarding transition (or adjustment) but it appears that the EU will almost certainly insist that the Court of Justice of the EU (CJEU) retains jurisdiction during any agreed period. Escaping the clutches of the CJEU is a "red line" for some UK politicians but it is necessary to ask what would be the point of devising new dispute resolution mechanisms for a time-limited period.
EU Law Analysis has a more detailed analysis of this - Bridge over troubled legal water? Legal issues of the Brexit transition period
The Guardian 22nd September - Theresa May's Florence Speech: Key Points
Europa HIGHLIGHTS - Brexit
Law and Lawyers - Post on Round 3.