Passing the 137 1/2 milepost at Cogload Junction, looking west towards Taunton. Another loco visible on line from Bristol on right. Reporting number 620 was for a Plymouth - Paddington service A pleasing image from Cogload Junction, east of Taunton where the main line between the Westcountry to Paddington passes beneath the Bristol line which sweeps above it on a fine overbridge. It's not quite possible to identify the rather work stained Britannia on this morning 's working from the far West to Paddington, but the four allocated to Plymouth's Laira Depot together with the five at Old Oak Common were in frequent use on such duties as this before their wholesale move to Cardifff Canton in late 1956 when these duties went over to Diesel haulage .