Updated to 15 February 2019. For further updates see post of 22 February 2019
This post is a "catch up" on a number of "Brexit-related" applications for judicial review.
Judicial review may be described as a legal process by which the High Court reviews the lawfulness of official decision-making. The court is able to consider whether a public body has acted in accordance with its legal obligations and within its legal powers. Where legal error is found, the court is able to grant appropriate relief. Judicial review is not a process to allow judges to replace duly appointed decision-makers such as Ministers, Local Authorities, NHS Trusts, Chief Constables and so on. The court does not entertain mere busybodies since applicants have to show "sufficient interest" to bring judicial review but there is a public interest in ensuring that the rule of law is maintained.
Although a number of Brexit-related reviews have arisen it is not the role of the judges to stop Brexit. Such matters of high politics have to be left to Parliament and the Executive which is accountable to Parliament.
So, how have the courts been involved in Brexit? The following cases have come to my notice but I don't claim it to be a comprehensive list.
Court of Appeal (Civil Division) - The Shindler case:
The case concerned who was permitted to vote in the 2016 referendum. Parliament had defined that in Section 2 of the EU Referendum Act 2015. Mr Shindler's challenge failed - Court of Appeal (Civil Division) - Lord Dyson MR, Elias and King LJJ -  EWCA Civ 469 - and the Supreme Court refused to hear an appeal and gave these brief reasons for doing so.
Mr Shindler and others took a case to the Court of Justice of the EU - see The Guardian 26 November 2018 and CJEU Application Case T-458/17. 13 British citizens residing in Member States other than the UK asked the General Court to annul the decision of the Council of the European Union authorising the opening of negotiations on Brexit. The court ruled the application to be inadmissible.
Supreme Court - The Miller / Dos Santos case:
The Supreme Court ruled that an Act of Parliament was required to authorise the government to give notice under Article 50 Treaty on European Union. The case is extensively discussed on this blog and elsewhere. See UK Supreme Court Decided cases and Bailii  UKSC 5. The European Union (Notification of Withdrawal) Act 2017 followed this case and authorised the Prime Minister to give the Article 50 notice.
Court of Justice of the EU:
References from other States -
An article by Jonathan Goldsmith in the Law Society Gazette 13th February 2018 reported that a Dutch court had been persuaded to refer to the CJEU questions concerning the post-Brexit right of British ex-pats. However, that reference did not proceed for reasons explained by EU Observer.
The Law Society article also highlighted a reference concerning European Arrest Warrants (EAW) from the Supreme Court of Ireland in the O'Connor case - on which see European Papers.
A further reference concerning EAW was made by Ireland's High Court together with a request for an expedited hearing - see Irish Legal 23 May 2018. The request for an expedited hearing was granted and the opinion of Advocate-General Szpunar was published in August. Judgment was handed down September - see Judgment and discussion at EU Law Analysis.
Given the judgment in this case, it may be that the reference in O'Connor will be discontinued - see Irish Examiner 5 October.
Reference from Scotland -
Scotland's Court of Session has made a reference as to whether the notification of withdrawal under Article 50 Treaty on European Union may be unilaterally revoked by the UK. (Note - the UK government shows no sign of wishing to do this). On 8 June, the Court of Session (Outer House) decided not to make a reference to the Court of Justice of the EU -
ANDREW WIGHTMAN MSP AND OTHERS FOR JUDICIAL REVIEW AGAINST THE SECRETARY OF STATE FOR EXITING THE EUROPEAN UNION - 08 June 2018
An appeal to the Inner House followed and, in September, the court decided to refer the point to the CJEU -
Andy Wightman MSP v Secretary of State for Exiting the EU  CSIH 62
The CJEU has received the reference - see HERE. The case number is Case C-621/18 and a request for an expedited hearing has been granted with the court hearing set for 27 November 2018 - BBC News 5 October.
Update 19 October - A further hearing was held in the Court of Session which did not withdraw the reference to the CJEU but fixed a further hearing on 8 November on the question whether the Govt should have permission to appeal to the Supreme Court on the decision to refer. Update 8 November - the government's attempt to prevent the reference failed - The Guardian 8 November 2018.
Update 6 November - The government's argument to be presented to the CJEU
Update 8 November - Good Law Project published written arguments - HERE
Update 12 November - the government is seeking from the UK Supreme Court a ruling that the Court of Session is wrong to refer the question to the CJEU.
Update 16 November - see UK Supreme Court re government application to appeal
Update 20 November - The Supreme Court refused the government's application to appeal
Update 26 November - Good Law Project - Article 50 hearing - key documents in the public domain for the hearing before the Court of Justice of the European Union on 27 November 2018.
Update 4 December - the Advocate General's "non-binding" opinion - see this post
Update 10 December - the court ruled that the Article 50 notice is revocable unilaterally - see post of 10 December for more details.
Update 20 December - the Court of Session issued a declarator in line with the CJEU judgment.
Whether the Art 50 notification may be unilaterally withdrawn was not answered in the Miller / Dos Santos case because that litigation proceeded on a basis agreed by the parties that the government would not revoke the notice. This was criticised - e.g. Eutopia Law - Miller judgment breaches UKSC duties under EU law
For further discussion about unilateral withdrawal see this previous post 23 July 2017
and also see Professor Steve Peers at Eulaw Analysis 18 January 2018 and European Law Blog 24 September 2018.
a) October 2018 - The prime minister’s refusal to hold a public inquiry into the Brexit referendum is to be challenged in the courts - The Times 3 October. The request for a public inquiry came about because of spending irregularities during the referendum campaign. This matter is brought by Fair Vote UK . See the latest update 22 December - 'Our judicial review application has been submitted and a judge will soon be considering whether to grant permission for our case to go to the next stage: a full judicial review hearing where we will get to set out our case in full.'
b) R (Good Law Project) v Electoral Commission  EWHC 2414 (Admin) - held that the Electoral Commission had misinterpreted the definition of "referendum expenses" in section 111(2) of Political Parties, Elections and Referendums Act 2000. The source of its error was a mistaken assumption that an individual or body which makes a donation to a permitted participant cannot thereby incur referendum expenses. As a result of this error, the Electoral Commission had interpreted the definition in a way that was inconsistent with both the language and the purpose of the legislation. Previous post 17 September.
On 4 October, the High Court refused an application to appeal the decision - see Good Law Project.
c) Crowdjustice (Article 50 Challenge) and on Twitter @A50Challenge – When did Parliament decide that the UK should leave the EU. The High Court rejected this application - see Divisional Court judgment - R (Elizabeth Webster) v Secretary of State for Exiting the EU  EWHC 1543 (Admin) - and the discussion at Monckton Chambers - Brexit blog.
The court said:
this previous post
d) An application brought by Good Law Project for judicial review was rejected in relation to obtaining publication of “secret Brexit studies” held by the government. See Good Law Project – 6th March 2018
e) Good Law Project has issued proceedings against the Electoral Commission regarding funds given to the Democratic Unionist Party (DUP) and used to campaign for a Leave vote - see Good Law Project.
f) UK in EU Challenge - a hearing in the High Court on 7 December 2018 brought by UK in the EU Challenge -
Update 8 November - Grounds for Judicial Review
Update 7 December - Skeleton arguments in the case
Update 17 December - On 7 December, the High Court ruled the challenge to be out of time. An application has been made to the Court of Appeal.
Update 11 February 2019 - there is to be a further hearing on 21 February - see UK in EU Challenge.
Update 15 February 2019 - Brexishambles.com The Brexit Files: Part II. Is Wilson v the Prime Minister the silver bullet that will kill Brexit?
Please see these links for on-going activity ....
Crowdjustice - "Brexit"
Fair Vote UK
Good Law Project
UK in the EU Challenge
A similar post dated 28 March 2018 has been deleted.