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BAA is floating plans to use geothermal energy to 鈥渄e-ice鈥� the ground under aeroplanes during the winter months at Heathrow, to avoid a repeat of the long delays suffered by thousands of passengers last December.

In a twist on the underfloor heating concept, the airport operator is considering harvesting waste energy in the summer months, storing it underground and then using it to warm the ground directly below aircraft in icy conditions.

Steven Morgan, BAA鈥檚 capital projects director, said: 鈥淚t鈥檚 not the snow that caused problems last year, it was the ice. We are working on a concept to capture geothermal energy from the surface of the tarmac, so energy without using the grid, during the summer, to then provide a heating capability so the stands don鈥檛 freeze in the winter.

鈥淲e would store the energy underground and use it to gently heat water that would then be run through pipes in freezing conditions to warm the stands, which are the slabs of concrete directly beneath the planes, to just above zero.鈥�

Last year scores of flights were cancelled and passengers left stranded after unusually heavy snowfall and ice meant planes were unable to use the runways.

At this stage there is no indication of how much this concept, which is currently at the research stage, might cost to implement.

BAA is also due next month to launch a system of robotic cars, or a Personal Rapid Transit system, to ferry passengers between the T5 Business passengers鈥� car park and the terminal without having to wait for a shuttle bus.