66773 'Pride of GB Railfreight' dead in tow on the rear of the 10.21 Watford South to Bescot engineering train. Whilst the thick fog hung around all day, just the very slightest of weak sunshine has managed to penetrate it to illuminate the trailing cab end. The last time I saw this Class 66 it was in a somewhat different environment, see......
https://www.ontheupfast.com/p/21936chg/29595734804/x66773-10-35-bletchley-cemex-peak