A strike by London firefighters planned for tonight has been called off.
Members of the Fire Brigades Union had been due to walk out for five hours in a row over pensions.
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The officer, known only as NC32, ducked for cover behind a car as eight rounds were fired directly at him.
The abuse began as the train approached Northwood. The woman carried harassing her victim until the next station.
London mayor Boris Johnson delegated the final decision to a deputy after publicly supporting the project.