Three quarters of the Chiltern Train Class 172 fleet, all on one train! 172101, 172102 & 172104 pass Fritwell on 26 August 2017 with the 1R51 17:32 Marylebone to Birmingham Moor Street Chiltern Railways service. Only 172103 is missing! This was running as a short term special, specially strengthened to compensate for the closure of Euston station for engineering works.