This was a morning visit to my local heritage railway, the Bo'ness and Kinneil Railway with their May 2024 Diesel Gala taking place featuring 37403 'Isle of Mull' and two guest locos courtesy of GBRf - 66309 and a Class 73970 which has been named after the late "W.S. Sellar" a fitting tribute to a leading railway photographer and railwayman.