Devon and Cornwall Police said it had voluntarily referred the matter to the IPPC.

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But Mrs Aspinall, whose 18-year-old son James died in the tragedy, asked why Sir Norman had not waited until after the IPPC's work was complete.

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The IPPC spokesman said the local man had been arrested just after 1900 BST, after a number of calls to the police about his behaviour at various locations in Wells.

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