Case T-458/17: Judgment of the General Court of 26 November 2018 — Shindler and Others v Council (Action for annulment — Institutional law — Withdrawal of the United Kingdom from the EU — Agreement setting out the arrangements for withdrawal — Article 50 TEU — Council Decision authorising the opening of negotiations with the United Kingdom with a view to conclusion of that agreement — UK citizens residing in another EU Member State — Preparatory act — Act not open to challenge — Lack of direct concern — Inadmissibility)