In his ruling, the presiding judge said he will ask the European court preliminary questions about what the consequences of a Brexit would be for EU citizenship and the rights which EU citizenship brings. However, government officials yesterday downplayed the possibility of a breakthrough with a further Cabinet "Brexit away day" being planned for next week.
It comes amid reports the European Union is looking for the power to suspend Britain's access to the single market if it violates agreed rules during any transition period.
By comparison, a free trade deal would hit London's growth by just 2%, growing to 3.5% in a no deal scenario, and just 1% if the country stays in the single market.
Sky News lays them out best.
The first Brexit cabinet committee will focus on Northern Ireland and immigration, while trade will be discussed on Thursday.
The figure, calculated over a 15-year period, compares with the 8.5% hit to GDP predicted by a Scottish government study last month.
Britain will be able to negotiate new trade deals with other countries, but can not put them into effect during the transition period unless authorised by the EU. In all circumstances economic growth over the next 15 years would be less than if the United Kingdom had remained in the EU.
Terms of the transition deal will be on the negotiating table this week, with key issues up for debate including immigration, Britain's ability to strike third-party trade deals, and whether Britain will have to abide by new European Union laws.
Scottish Liberal Democrat leader Willie Rennie said: "The government's own research is now showing that Brexit will be an economic disaster for every part of the UK. We should not leave the European Union until we know where we are going", he said.
The four members who backed Leave are International Trade Secretary Liam Fox; Foreign Secretary Boris Johnson; Brexit Secretary David Davis; and Environment Secretary Michael Gove.
The British Chambers of Commerce warned in an open letter that there is "no room for continued ambiguity" as companies try to make hiring and investment decisions, with the deadline for leaving the European Union drawing near.
In the event that Scotland stays in the single market and customs union, it would lose an estimated 2.5% more of its GDP than now projected.
Many Japanese drug companies have made Britain their European base in recent years and are anxious, like their peers, about the future of drug regulations, with any divergence with the European Union likely to pose regulatory challenges.
Former BBC journalist and manager in Belfast, Manchester and London, Editor Spolight; Political Editor BBC NI; Current Affairs Commissioning editor BBC Radio 4; Editor Political and Parliamentary Programmes, BBC Westminster; former London Editor Belfast Telegraph.