And people think in this day and age there is no need to be a member of a Trade Union ? ? ?
Things like this are incredibly difficult unless you have some form of backing or you can get a united front with other employees and sadly in this modern culture of 'Thatcher Children' its all me me me and looking out for number one so you often find that to your face everyone is behind you... however, infront of management that can all soon disappear.
If you kick up a stink then your card will no doubt be marked and the employer will just find an excuse to get rid of you a few months down the line with something like 'redundancy'.
Handle with care, be tactful, and good luck.