Metropolitan Police staff have voted to go on strike over office working.
A Public and Commercial Services union (PCS) ballot showed overwhelming support for industrial action, with 85% of members who voted saying yes to taking strike action and 91% voting for action short of a strike.
The PCS said it showed the depth of feeling after managers reversed an existing agreement on blended working that allowed staff to work from home part of the week.
The new policy, which the union says requires staff to work in the office for between 60% and 100% of the time, would affect 2,400 people who support the day-to-day work of police officers.