Scottish Water has submitted its first drought order application in five years following a prolonged dry spell across parts of the country.

BBC: Black Esk reservoir - courtesy Scottish Water

One challenge is to ensure that the application is uniform and without bubbles or dry areas which would result in ensuing weakness of the blade.

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Mr Jones reckons that 80% of the growth between 1950 and 1993 came from the new application of old ideas, and these old ideas are now mostly wrung dry.

ECONOMIST: Economics focus