Walking past the VoR shed at Aberystwyth today on my lunchtime stroll I noticed parked up behind one of the VoR tanks what looked like a Kerr Stuart Wren loco. It was painted grey but I couldn't se it properly as the diesel was also parked in the way. It was still there this evening when I drove home but it was pitch black. I'll take my camera tomorrow and try and get a photo if it's still there. Anyone know what it might be and what it's doing there?