Berlin's Brandenburg Gate, Paris' Eiffel Tower, Rome's Vatican and Barcelona's Sagrada Família have joined the WWF's Earth Hour in switching off their lights for an hour to raise awareness of climate change and energy use.
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Turning mild for the middle of the week.
Impact, which represents Irish-based pilots, agreed has to meet Ryanair's management ahead of the planned strike on Wednesday.
Four-time Olympic champion Sir Mo Farah upset the odds to be named 2017 Sports Personality of the Year