On 22 May 1957 the BBC produced a live outside broadcast from the railway, during which Wynford Vaughan Thomas and Huw Weldon commentated on a trip from Dolgoch to Abergynolwyn. The publicity from this broadcast drew substantial numbers of visitors to the railway that summer, with more than 57,500 passengers carried, and this increase in revenue in turn enabled the railway to continue to improve its infrastructure and provide tourists with a better experience. The following year locomotive No. 1 "Talyllyn" returned to steam after an extensive overhaul.