Judgment of the General Court (Fourth Chamber, Extended Composition) of 5 October 2020.#Colin Brown v European Commission.#Civil service – Officials – Official with United Kingdom nationality at the date of entering the service – Withdrawal of the United Kingdom from the European Union – Acquisition of the nationality of the country of employment during the course of a career – Loss of the expatriation allowance – Equal treatment – Principle of non-discrimination – Article 4(1) of Annex VII to the Staff Regulations.#Case T-18/19.