Whether the Police Federation demur or acquiesce on any matter is of absolutely no consequence whatsoever. Police officers are unable to take industrial action of any kind. The Federation are unable to direct,The Police Federation have surrendered every single allowance and every concession that was hard won on your behalf by previous generations since 1997, as has been pointed out to you before on this and other threads.
encourage or organise any such action. It was all designed by government and fixed in law to be that way.
Providing a proposed action by government complies with other legislation, police officers ultimately have only two choices; put up or else find another job.
Any concessions granted by any government have always been and will always be either at their own whim (usually with strings attached) or else as the result of insurmountable pressure from other quarters at a time when they are unable to resist.