The Government is today facing the increasing threat of co-ordinated strikes by millions of public sector workers in worsening disputes over pay and jobs.

The postal workers' row flared up again, with a national walkout set to be held by the end of the month unless a deadlocked row over pay and conditions is resolved.

Unions representing workers at Remploy, which employs disabled staff, warned of strikes over plans to close factories.

Meanwhile, the TUC Congress warned of co-ordinated industrial action by public sector workers, including civil servants and council staff, which could lead to an autumn of discontent.

Steve Cox, of the Prison Officers Association, told the Brighton conference: "None of us wants a repeat of the winter of 1978 (the Winter of Discontent) but if the Government ignores the workers and shuts the door in our face ... we will all be on the streets."

The Government will also today announce a crackdown on rogue employers who exploit vulnerable workers and refuse to pay the minimum wage.

Business and Enterprise Secretary John Hutton will tell the TUC Congress that the maximum fine for employers who don't pay the minimum rate will be increased.