Looking superb in its newly applied BR green livery, complete with BR crest and Western Region number W55034, Chiltern Railways 121 034 undertook its first major move on Wednesday 4th May 2011. It worked as 5A00 from Tyseley Loco Works to Aylesbury DMUD prior to taking up passenger duties. It was due at Princes Risborough at 11:50 and arrived a few minutes early at 11:43 before reversing and setting off again to Aylesbury at 11:57, still a couple of minutes early. Digital Image No. GMPI8848.