168 219 speeds southwards through Princes Risborough on the up main line as it overtakes 20308 and 20312 in the platform. The 168 is working 1H04, the 06:42 from Birmingham Moor Street to Marylebone, running on time at 07:59, while the Class 20s are on 1Z20, the 05:05 Crewe to Liverpool Street "Buffer Puffer" railtour. Saturday 26th January 2013. Digital Image No. GMPI13803.