BR 9F 2-10-0 No 92006 leaves Chilcompton tunnel with the 2.50pm Bath Green Park to Bournemouth train on August 12, 1961.
Peter Kerslake says "Something seems to have caught the attention of the fireman on 92006 as they head from Chilcompton tunnel between Midsomer Norton and Shepton Mallet".

Photo: M.J. Fox/Rail Archive Stephenson