In early May 1991 I seem to recall this machine being trialled on a midweek daytime on the Doncaster - Lincoln line near the M18 bridge. The line was under a prolonged shutdown due to bridgeworks near Lincoln.
3 of us went on a site visit from York as we were booked to work with it a few weeks later at Filey.
This may in part be down to these seeing increased use in recent months. I understand trials of using three TRMs in multiple to install large track panels were successful hence there is increased demand for these.
Looking through old photos I'm reminded that a piece of this (that has the number on) was found at Embsay Railway in 2010! Quite how it ended up here when it was scrapped the year before in Slateford is a mystery...