Your employer will simply not reconise your union, it all depends on the size of your employer and what % of the work force will join you, however be careful at some stage someone will grass on you and identify you as a trouble maker, in this market they will find a way of making you redundant or trip you up for the sack, it is an employers market now and they can change anything hours etc on the basis they are saving your jobs or keeping the company fit to survive the gloom, many blue chip cash flush compaines have used the eco gloom as an excuse to slash jobs, amend contracts and pull out of pensions saying if you do not allow us to do this then everyones job will go, suggest you sit tight for now, play the game and be glad you have a job