Blue Ensign defaced with the badge of the Metropolitan Police: A roundel azure, thereon the Royal Cypher of Her Majesty Queen Elizabeth the Second argent within a circlet azure fimbriated and inscribed with words 'Metropolitan Police' in letters argent, the whole upon a star of eight major and fifty-six lesser points argent, ensigned by the Royal Crown proper ("A blue disc with the royal cypher of Elizabeth II in white, surrounded by a blue circlet with white edges and the words "Metropolitan Police" in white, on top of a white star with sixty-four points, below a St Edward's Crown in its natural colours"). Flown by the watercraft of the Metropolitan Police's Marine Policing Unit.
This file was derived from:

 Flag of the United Kingdom.svg
Government Ensign of the United Kingdom.svg
Flag of Metropolitan Police.svg
Own work based on: Flag of the United Kingdom.svg, Government Ensign of the United Kingdom.svg  and Flag of Metropolitan Police.svg