In both instances, the Met Office failed to predict the movements of the jet stream - the high-level wind that races round the world 10km above the surface.

BBC: Met Office cools summer forecast

The height used for measuring the wind was 10m - far above street level.

BBC: Who, What, Why: What is wind chill factor?

At the pro level, what naturally happens is you see things whittle themselves down where you wind up with a smaller cross-section.

FORBES: Move up http://i.forbesimg.com t Move down

Above sea level, the offshore structure has been bolted together with a conventional offshore turbine of the sort used for near-shore wind farms that are bolted to the sea-bed.

BBC: Floating challenge for offshore wind turbine