Nuclear siren will be tested

Defence correspondent om Cotterill on the jet simulator

The News defence correspondent ‘lands’ jet on HMS Queen Elizabeth

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Portsmouth’s nuclear emergency siren will be tested this week.

The siren is tested three times a year, and is due to be sounded again on Thursday.

The siren, a wavering tone, will last for one minute and will start at 9.30am.

The routine testing forms part of the nuclear accident response plan for the naval base.