Positive Traction Limited (PTL) have taken one of the ubiquitous 08 Shunters and converted it to battery power - surprisingly, there are still quite a number of these locomotives in use throughout the UK. For example, RMS Locotec is a major supplier of 08 Shunters and have a fleet ready and ideal for conversion. The initial 08 Shunter project required changes to the power source for the vehicle along with bodywork modifications, driver cab changes and a modern control system.