BR Class 45 No. 45108 BR Class 50 No. 50008 Chinnor and Princes Risborough Railway Class 31 Class 45 Class 50 Class 50 No. 50015 Rail News standard gauge Four visiting locomotives for Chinnor diesel gala Guest authors February 21, 2025 0 The Chinnor & Princes Risborough Railway is holding a Diesel Gala over the first weekend in April featuring four guest mainline diesel locomotives.