A surprise Class 37 working on 14 May 2007 was the 6M33 16:21 Avonmouth to Wembley Yard 'Enterprise' service, normally the preserve of Class 67 traction. Running approximately 40 minutes early, 37406 The Saltire Society & 37422 Cardiff Canton are pictured passing Compton Beauchamp (between Swindon and Didcot). I had chosen this location as it would be the least backlit spot along this stretch of line. In the event the train came in a couple of minutes worth of cloud!