Traffic wardens in Camden, central London, have voted for further action in their pay dispute.
A strikers’ meeting asked for a two-week strike later this month. Dates have yet to be confirmed.
The Unison union members are fighting outsourcing giant NSL for £9.50 an hour and better terms and conditions.
Workers struck twice for three days in August, and for seven days in September.
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Bus workers rejected an offer and came back out