The seventh of eight programmes looking behind the doors of Westminster and Parliament.

About 70 new Acts of Parliament are 'enacted' every year at Westminster after a long and complicated process which starts as a proposal by Government, then drafted as a Bill by civil servants before being presented to Parliament for consideration.

Getting a bill through requires firm and thorough organisation by the politicians, culminating quite often in a little talked-about but powerful group known as 'the usual channels'.

Tonight's programme probes the heart of the machine which makes our laws.