Richard Dixon, director of WWF Scotland, said the news the leak had stopped was welcome, but pointed out it was the second serious leak in the North Sea in two years.
"We should be trying to give up our addiction to oil and gas, and not seeking it out in more difficult places with the risks to the environment that poses when things go wrong," he said
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Engineering firm CH2M won the £170 million contract but have pulled out of phase two of the project over alleged conflicts of interest.
The bronze bust unveiled at Madeira airport has been slammed as "horrifying", "appalling" and "awful" on social media.
The Duke of Cambridge also laid a wreath in memory of the brave policeman who was killed in last week's terror attack in London.