The train tours appeared to be a night mare for maintenance yesterday. I was surprised that it was operating due to the extreme cold weather as both troublesome trucks and accelerator had been closed for the entire event yesterday. Whilst was was sat with Thomas pulling the train, we noticed it slow dramatically and jolt a couple of times. On the way back from the zoo to Thomas land for the return, the ride operators appeared concerned and was told to drive it very slow. Whilst passing Rosie we noticed the maintenance team switching Rosie on and inspecting it over. Later in the evening Thomas had been replaced by Rosie but we noticed that the crew again was on the floor with headlights looking at Rosie’s under carriage.