Local firefighters will walk out on strike for 4 hours from 6pm this evening.
It's the 3rd time in recent weeks the crews have downed tools.
Members of the FBU are angry over changes to their pensions and the raising of the retirement age from 55 to 60 .
There will be another walkout between 6pm and 10pm tomorrow night.
Devon and Somerset Fire and Rescue Service says they have contingency plans place and will answer 999 calls.
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