In the past year alone we have seen some of the most dramatic swings in weather.

He was quoted as saying that there had been a dramatic swing in public opinion - with almost half of people now in favour of new housing in their area.

But there were also some dramatic swings between night and day temperatures.

Far more dramatic swings in temperature have occured in the past, and sometimes within just a few hours.

However, the lack of long-term crude supply contracts meant that the company was subject to dramatic swings in the cost of raw materials and refined products.