67027 passes Cholsey on 2 January 2015 with the 1Q05 11:00 Old Oak Common to Derby RTC test train. 67015 is on the rear. Note the two isolated masts on the right, the sign that this location will soon become impossible for photography. Quite why just these two have been installed is a mystery. There seems to be no logical progression, with random batches of masts appearing at different locations.