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.
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Gulf War veteran Paul Briggs' widow, Lindsey, 40, launched legal action to have his life support withdrawn so he could "die with dignity".
Rescue workers are at the site Sunday morning trying to cut open mangled coaches.
Despite chilly temperatures it will be a mostly dry day, and milder than yesterday.