50017 Royal Oak rounds the sharp curve at Duffryn on 15 August 1987 with the 1A27 07:05 Carmarthen to Paddington service, which it had worked from Swansea. I haven't got many pictures of Class 50s in South Wales, especially in the early version of Network SouthEast livery. However, on this particular day I also photographed 50025 heading in the opposite direction.