Network Rail is confident that the £100 upgrade to track and signals in Nottinghamshire will provide huge benefits despite weeks of disruption ahead.
Justin Page, Route Master for the East Midlands, said when finished, the work will mean shorter journey times, more trains and a more reliable service in the county and throughout the region.
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A "sexual predator" who gave drugs to under age girls and then had sex with them has been jailed for 12 years.