31452 runs along the up relief line at Circourt Bridge, Denchworth, on 27 April 2016 with the 5Z34 06:11 Bristol Barton Hill to Wembley ECS, conveying a refurbished Chiltern Railways Mk 3 coach. At 07:40 the lighting is very head on at this location (as it is everywhere else in the locality), but I thought head on with guaranteed sun at this early hour was a better bet than the return 5Z35 working just after midday, when it was forecast to be mostly cloudy.