A perfect winter's day in the Thames Valley, with some proper traction on offer! 50025 Invincible runs along the up relief line at Purley-on-Thames on 11 February 1989 with the 1F39 10:00 Oxford to Paddington Network SouthEast service. This is my penultimate picture of 50025, which was sadly written off in a derailment at West Ealing just six months later.