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The steaks are aged for 21 days and arrive frozen and individually vacuum-sealed so they can be pulled out of the freezer and quickly defrosted whenever the urge strikes.

Alaska is both the most climate-vulnerable state in the nation and, with its ice-locked methane beginning to defrost, a virtual climate bomb.

Once the meat is defrosted, cook it immediately.

Staff at Network Rail will also be equipped with specialist kits to defrost frozen points and signals to keep the railway running safely.

However, at a staff handover on 25 May, she heard nurses saying they had only just disposed of breast milk which had been defrosted more than 72 hours earlier.