37602 passes the site of Challow station with the 1Z14 10:00 Westbury to Derby Serco test train on 12 October 2006. This train was originally booked to do 05:35 Westbury to Weymouth, but a last minute change of plan saw it heading home via Swindon and Oxford instead. 37611 was on the rear of the train. This is the start of the four track section to Wantage Road, the loops being reinstated in the mid 1990s, to add capacity for the Avonmouth to Didcot Power Station coal trains.