Rail repairs blitz begins

Railtrack begins its largest rail-replacement programme since the Hatfield crash in October - with 8,000 engineers working at more than 60 sites. They will be on duty around the clock over the Christmas period, in an attempt to get about 100 speed restrictions lifted. The Christmas works programme began as soon as the last train ran on Sunday night and will last until 27 December. The BBC's John McIntyre reports.