The 1Z03 09:37 Bristol Temple Meads to Derby RTC Network Rail test train lost its path over the Cotswold Line on 24 March 2016, leaving Oxford an hour late, and consequently following right behind the 1W32 12:20 Paddington to Worcester Shrub Hill GWR HST. This lead to it coming to a stand at a red signal at Ascott-under-Wychwood, where it waited for 10 minutes, until the HST cleared the section. 37688 Kingmoor TMD is pictured noisily getting under way again, with classmate 37601 Class 37-'Fifty' just visible on the rear. The ramshackle buildings on the right are on the site of Ascott's former small goods yard.