However, he also trains harder than anyone else, pushing himself to the limits of human ability.

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He also upgraded Underground trains and brought in a controversial congestion tax on motorists entering central London.

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Farah will continue to train at altitude in Kenya and Font Romeu in France - where Paula Radcliffe also trains - and insists he is not taking a major gamble with the London Olympics only 17 months away.

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The ticket systems and frequency of the trains using the line, also needed to be improved, he added.

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The flames themselves are "beautiful things, they're live things but they're also dangerous things", he said, adding they involve control equipment, valve trains, burners and ignition systems.

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He said the route would cut car journeys and also confirmed that the project would allow for tourist trains at Tweedbank station.

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Though he now trains in Oregon with Rupp and Salazar as part of a Nike-sponsored track team, he also has spent time in Africa, where he trained with Kenyan runners and emulated their way of life.

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