Web page http://www.therailwaycentre.com/UK%20News%20Oct%202007/021007_TMILLS.html Second photo down.
therailwaycentre.com said:
Above: One ‘locomotive’ os allocated to the depot which will NEVER be seen on the main line, battery-powered radio-controlled shunter of type RBL-030-1200 and numbered TM-FL-009 which is used to move vehicles within the main workshop area. It was built by Sculfort in France. CJM