The Honourable Mr Justice Mark Horner

The Honourable Mr Justice Mark Horner

Judicial Member


The Honourable Mr Justice Horner was educated at Campbell College which he left in 1974.

He then attended St Catharine’s College, Cambridge from 1975-1978.

He was called to the Bar in 1979. He was appointed a QC in 1996. At the Bar he had a wide and varied practice with a particular interest in commercial disputes, Chancery and professional negligence cases and personal injury litigation.

Mr Justice Horner was appointed as a High Court Judge in Northern Ireland on 5 September 2012.

His areas of special interest include rehabilitation of young offenders through sport, practice and procedure in this and other jurisdictions, chancery, commercial litigation and public law.

He is the Chairman of the Judges’ Council, Chairman of Northern Ireland sub-committee of European Network of Councils for the Judiciary (ENCJ) looking into minimum standards for judges across Europe and President of the Lands Tribunal.

He is the Judge in charge of the new Commercial Hub. He is leading the working groups on Digitalisation of the Court Processes and on Covid Recovery.


Period or Appointment

The Honourable Mr Justice Horner was appointed as a Commissioner in the Northern Ireland Judicial Appointments Commission for a 5-year term from 8 September 2021 to 7 August 2026.


Political Activity




Other Public Appointments Held and Remuneration Received

Judicial members with the exception of the Lay Magistrate are not remunerated for their appointment.