A Downing Street spokesman has told ITV News a "small logistical unit", including an unspecified number of troops, were paying £1 for showers while they were setting up the shower unit for troops staying at temporary living quarters at Tobacco Dock in east London.
However, the unit is now in place and the troops will be refunded, if they have not been so already.
More top news
Sixteen Colombian police officers have been killed after their helicopter crashed while searching for the nation's most-wanted drug lord.
Two men have been arrested after a methamphetamine lab was discovered inside a Taco Bell restaurant in the US.
The Labour leadership contender has vowed to renationalise Britain's railway network "line-by-line" if he becomes prime minister.