Buckhampton Model Railway

Thank you everyone for your suggestions. The shed is insulated (thick underlay, celotex walls and ceiling) but it sounds like a low level heater may be the way forward. I've put a series of damp catchers in there for now but will look into some low power heating for out there. Thanks again!

Hello. Long time reader, first time caller. I was lucky enough this year to set up a model railway in my brand new metal shed. At 8ft by 20ft, I reckon I'll have plenty of space! This is my first winter and I've noticed the performance of many of my locos has dropped. My shed only has heating when I'm out there (and it isn't perfect). My question is this? Could the cold or possibly damp be causing any running issues? The track is clean. Only some rolling stock is affected (typically older locos or 0-4-0s) so I don't think it is a track issue. Many thanks in advance for any help.