http://www.nmrs.co.uk/mainframeset.htm Manvers closed 25th March, 1988 - not in 1989.

TSC/T-Mobile

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TSC is an out-sourced customer service company based in Scotland whose clients include T-Mobile. The T-Mobile call centre was bought out by TSC in 2005 although the building still provides support for T-Mobile customers.

http://www.tsc.co.uk/May05-TSCDearneJobs