National Express is adding thousands of coach seats to its Bath services to support rail passengers who are facing weeks of disruption to train services.The operator is preparing to add nearly 18,000 extra seats on services running between Bath and London during rail engineering works on the First Great Western line, which start this weekend and run for seven weeks (Saturday 18 July - Monday 31 August).Rail engineering works will reduce the number of trains from Bath Spa to London to one per hour and increase journey times by half an hour as the line between Chippenham and ...