David Hutchinson from Derbyshire Fire & Rescue service says the blaze which partially destroyed the sports hall at the St Anselm's Prep school in Bakewell, most likely started in the bolier room, and the fire is not being treated as suspicious.
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After a wet and windy start to Tuesday, rain will clear to the north to leave it dry, with easing winds but largely cloudy skies.
Early rain will clear northwards during Tuesday morning, allowing drier conditions behind.
Lincoln Castle is among the three venues that will host the Tower of London poppies this year.