Thatcher did allot more then that. After the first national steel strike in 1980 where the steelworkers went for a 17% pay increase, sounds allot but take into account the inflation rate was 20% at the time, the steelworkers also fought to protect jobs. British Steel offered 2%, and proposed plant closures and 52,000 redundancies. These lads fought hard for there jobs, huge pickets were mounted at some sites and flying pickets were organised against private sector steel users. 13-weeks later, the workers won a 19% wage increase, although thousands of jobs were lost, job losses was also part of a plan to weaken the unions. Thatcher was not happy at losing and passed new laws to out law solidarity strikes and picketing. She didn't stop there, her view was that a conservative government could not be seen to be bowing to the working class people and the unions at that time where the back bone of the Labour party. Then she went onto pass laws which where known as anti-worker legislation, which included outlawing unions from engaging in political action, allowing employers to sack and selectively redeploy workers, and To seize unions' assets if they broke industrial laws. Sorry to go on but i am doing a law degree and have done trade union law. After those laws where passed she picked the unions off one by one.
Imagine if the words of Imagine ever came true.....