Nottinghamshire Police say a protest by 15 campaigners, staged inside two chimneys at West Burton power station near Retford, is costing £20,000 a day to police.
The campaigners say they plan to camp inside the chimneys for a full week and this morning have taken to flying kites and tweeting pictures.
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The Fire and Rescue service were called to Lynmouth Close in Leicester on Friday night.
Cold and frosty with some fog patches.
Mainly dry with some clear spells. Staying cold.