31233 passes Hinksey Yard on 28 July 1983 with what I would ordinarily think was the 6A50 13:56 Bicester to Morris Cowley Speedlink trip, but as 50032 Courageous had passed by just five minutes earlier with a similar train, I'm not so sure. 31233 returned an hour later. Class 50s and 31s on mixed freights five minutes apart - those were the days!