From Festipedia, hosted by the FR Heritage Group

Talyllyn Railway No 1 Talyllyn (Fletcher, Jennings no 42 of 1864) paid a surprise visit on 21 April 2014 when it came for motion repairs at Boston Lodge, the TR works being busy at the time. It was transported from Gasworks Siding on a bogie flat wagon, and returned the same way when the work was completed on 19 September 2014. Of course it never ran on the FR due to the gauge difference.