First heatwave for seven years

London is in the midst of its first official heatwave for seven years - and there is no sign of the mercury plummeting any time soon.

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Heatwave takes its toll on London's emergency services

The heatwave is taking its toll of London's emergency services. With no let-up in the soaring temperatures, firefighters and paramedics have seen a surge in calls.

And as Londoners heed advice about coping with the heat, Thames Water said it has seen a 15% rise in the demand for tap water in the capital. Piers Hopkirk reports:

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