166220 & 166205 approach Culham at speed on 9 July 2015 with the 1D67 18:50 Paddington to Oxford First Great Western service. This would normally be operated by a HST, but due to the RMT union's 48 hour strike, virtually all HSTs to Oxford were replaced by Turbo units. The reduction in top speed from 125mph to 90mph seemingly having little effect on punctuality, proving that the timings are very conservative for HSTs on this route.