A detailed map of a British military base which was previously attacked with a grenade had been left online by a contractor.A detailed map of a British military base and installation has been publicly available on a contractor’s website for at least two years.

The plans of the British Sovereign Base Area of Dhekelia in Cyprus labelled the locations of generators, diesel tanks, liquid petroleum gas containers and water storage.

The details could provide intruders with enough knowledge to compromise key infrastructure points for the people who live and work there, including the precise layouts of barracks and the site of the ammunition depot.

In 2017 a grenade was thrown at the entrance to the Dhekelia base by a man on a motorbike. The small explosion broke a window and didn’t injure any personnel.

The map clearly marks how to access to the base’s schools and leisure facilities – including sports grounds and swimming pools – which will be of concern for the families of the personnel who inhabit the base.

Dated 30 May 2003, the map was uploaded in June 2018 by ALC, a joint venture set up by engineering firms Babcock and Amey to manage equipment and vehicles for the Royal Engineers and the Royal Logistics Corps.

The Ministry of Defence (MoD) denied that any of the information on the map is “sensitive”.