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.
More top news
A vegetable grower's colossal cabbage became a record breaker weighing in at 23kg - the same weight as a 7-year-old child.
Leicester City striker Jamie Vardy is concerned his racism storm has left a "permanent stain" against his name.
An elderly motorist has been arrested after a pedestrian on crutches suffered life-threatening injuries in a hit-and-run.