All year round, 24 hours a day, British Rail is part of the nation's life blood. It is used, abused, tolerated, criticised, appreciated and even sometimes praised by all of us at some time or other. With a turnover exceeding £2,000 million a year, and more than 130,000 staff, it is one of the country's major industries. Railwatch is live from York, historic railway city and headquarters of BR's Eastern Region, the midpoint of the prestigious East Coast main line that links London with the north of England and Edinburgh. Every day this week, the programme goes behind the scenes to find out by whom and how the network is run.