This unit also carried out similar work on the East Grinstead electrification two years later .
This unit also saw occasional use on other test and tractor duties until laid up in 1995 , by which time it was the only South Tyneside unit left .
This unit also carried out similar work on the East Grinstead electrification two years later and saw occasional use on other test and tractor duties until laid up in 1995 , by which time it was the only South Tyneside unit left .