He tends to be a bit glum and grumpy because he still minds about boring things like time-tables and Regulations. In his spare time he likes to fish and relax by the river. Even Jones will join him, not for fishing, but relaxing. When Mr Dinwiddy put forward the idea of buying the railway with his gold, it was Dai that cautioned against it, as he could see others arriving to find gold in the hills, starting a gold rush and spoiling the landscape. They all agreed that this wasn’t the way to save the railway.