From
http://www.dartmoor-railway-sa.org/specialevents :
Sulzer weekend
On January 23rd and 24th, Dartmoor Railway CIC▸ will be running an enthusiasts weekend utilising the Polar Express traction before it leaves the railway. The locomotives available are 45060 'Sherwood Forester', 33103 'Swordfish' and 47701 'Waverley'. All are Sulzer-powered, the first 2 with Crompton Parkinson main generator and traction motors, the 47 with Brush electrics.