He told parliament problems with salt supply in areas including Fife and Edinburgh had been addressed, but he urged local authorities to share supplies and take measures to make them go further.

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My awareness helps me to make better choices and take preventative measures to hopefully avoid a diagnosis in the future.

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What we -- whenever something like this happens, what we want to do is to make sure that we take all appropriate measures to identify additional threats that are out there.

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Government officials said they had been forced to take the measures after previous drives to save energy had failed to make much difference.

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However, he said instead of having measures imposed on it, Northern Ireland should take its own actions in order to make a response which was finely-tuned to address NI's needs.

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Information leaflets and letters were distributed to residents living in the 'core zone' to help them understand the simple measures they could take, such as tilting outdoor security lights downwards instead of up, that could make difference to how dark the night sky appears.

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Like any incident like this, what we do is take the prudent steps afterward to make sure that we have our vigilance up, that we are taking the appropriate measures so that our security posture is strong, both overseas and here.

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