Firefighters in the West Midlands have staged a three-hour walkout in protest at changes to their shift patterns.
The action, which started at 7am on Thursday, is the second of three strikes called by members of the Fire Brigades Union (FBU).
The union is unhappy about compensation for anti-social hours, travelling long distances and leave arrangements.
West Midlands Fire Service said the latest proposals included an offer of additional annual leave and extra payments for working a late split-shift pattern.
The FBU has planned a further five-hour stoppage scheduled for next Monday and a three-hour strike on 23 November.