The union also said workers had been offered an “inferior pay rise for 2025-26, despite Met police officers being given a 4.2% pay rise in September 2025”.
It added that across the UK, both officers and staff had received the 4.2% increase without changes to their contracts.
Union members have rejected two provisional offers, either a below-RPI pay increase of 3.8% or a 4.2% offer, which is conditional on workers relinquishing their current terms and conditions.
Unite general secretary Sharon Graham said: “It is completely wrong that our members at the Met are the only police staff in the UK that have not had a pay rise.
“It is immoral to tell them that in order to get the same pay increase as their counterparts elsewhere they will be expected to accept worse conditions.”