Signalling problems between Oxford Parkway and Oxford caused lengthy delays on 30 June 2018. As the equipment is virtually brand new, Network Rail can't use their usual excuse about obsolete technology or lack of investment! 168324 & 168327 approach Wolvercote Tunnel with the 1T47 16:35 Marylebone to Oxford Chiltern Railways service. This was running 28 minutes late, after having sat at Oxford Parkway station for 28 minutes!