Norfolk Constabulary have urged firms involved in the schemes in the south of the county to tighten security, amid concerns they are providing lucrative opportunities for gangs.

The force issued the warning as part of the consultation process over proposals for a data centre at Keswick, on the southern outskirts of Norwich.

The security fears are likely to fuel the debate over the concentration of such schemes in a small area of south Norfolk which has been dubbed 'solar valley'.

An artist's impression of the proposed data centre (Image: Norwich Apex Ltd)

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