"Given the subtle slopes of the greens, don't be surprised if you see putts rolling off the putting surface should the wind get up, " he said.

BBC: THE LOWDOWN

Investigation work is due to get under way at the site of the planned wind farm off the coast of Aberdeen which is opposed by Donald Trump.

BBC: Photomontage of planned turbines

"When they come close to the Sun, this ice melts - solar wind blows this material out into space, so you get a tail of matter coming off the comet, " explains O'Brien.

BBC: Star of Bethlehem: The astronomical explanations