66004 shows off its 'I am a Climate Hero' green livery, as it passes Didcot North Junction on 10 October 2022, running 36 minutes early as the 0D11 10:46 Didcot to Appleford Sidings light engine. The loco has been converted to run on hydro-treated vegetable oil, which is claimed to reduce emissions by up to 90% compared with diesel.