Royal National Lifeboat Institution (RNLI) House Flag [2:3]

This flag flies at RNLI stations throughout the British Isles, including the Republic of Ireland.

RNLI Ensign [1:2]

RNLI Member

This flag can also use a plain navy background and can be used in burgee form.

Trinity House Jack & House Flag [4:5]

Master of Trinity House (HRH The Duke of Edinburgh) [1:2]

Deputy Master of Trinity House

Trinity House Ensign [1:2]

By special warrant vessels of Trinity House wear the White Ensign on the foremast when accompanying the sovereign.

Northern Lights Ensign [1:2]

Northern Lights Commissioners’ Flag (uses pre-1801 Union Flag) [1:2]

This is the only British flag still using the pre-1801 Union Flag.

Northern Lights Commissioner's Pennant [5:12]

This pennant flies at the fore with the house flag at the main when a Commissioner is onboard.

Irish Lights Ensign [1:2]

The CIL is a cross-border body and this ensign only flies on British-registered boats in their service.

Irish Lights Commissioners’ Flag [3:5]

Lloyd’s of London Ensign [1:2]

Marine Society Ensign [1:2]

Maritime Volunteer Service Ensign [1:2]

Aberdeen Harbour Board Ensign [1:2]

Mersey Docks and Harbour Company Ensign [1:2]

Port of London Authority House Flag

Port of London Authority Chairman

Port of London Authority Vice Chairman

Port of London Authority Ensign [1:2]

Eastern Sea Fisheries Ensign [1:2]

North Wales and North West Sea Fisheries Ensign [1:2]

South Wales Sea Fisheries Ensign [1:2]

Global Marine Systems Cable Ships Ensign [1:2]

Port of Dover [3:5]

Company of Watermen and Lightermen Ensign [1:2]