Matrix’s Legal Support Service provides a round-up of Brexit-related links and news.

Brexit and the UK Constitution

1. Scotland’s highest court is to hear a fresh challenge from anti-Brexit campaigners as they seek to have Boris Johnson’s agreed deal with the EU declared unlawful.

The UK’s post-Brexit deal with the EU

1. Boris Johnson has announced Brexit done deal despite DUP objections to new agreement. Downing Street is set to launch a charm offensive as it attempts to win Parliament’s backing for Boris Johnson’s new Brexit deal but Angela Merkel has told EU leaders a Brexit extension would be unavoidable if British MPs vote down the deal agreed with Boris Johnson.
2. This week Sajid Javid rejected calls by MPs to publish an economic impact assessment of Boris Johnson’s new Brexit deal before they vote on it.
3. Meanwhile, the Liberal Democrats have launched a fresh attempt to secure a second Brexit referendum on any deal that Boris Johnson strikes with the European Union.

Brexit’s impact on the economy

1. Britain is on course to sacrifice as much as £130bn in lost GDP growth over the next 15 years if the Brexit deal goes ahead, according to government figures.