Four character headcodes introduced around June 1961. 1964 - 1M36 was Summer Saturdays 2.50pm Paignton - Wolverhampton. Loco stored at 81A from October 1962 to December 1963. The chalked number 4089 on top of the smokebox door is the same as image dated 1964/07/28 at Reading shed. On 8/8/64 4082 also worked the 1M36 2.50 Paignton – Wolverhampton