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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Dry overnight with clear spells.
Dry on Thursday. Best of the sunshine in the morning.
A19-year-old man has been arrested and a motorcycle has been seized in connection with the incident.