Pan yn ymuno a trên, byddwch yn ofalus a'r gap rhwng y trên ac ymyl y platfform os gwelwch yn dda.

— Glyn's mind the gap announcement.

Glyn, real name Eryl Jones, is an automated announcer on the British railway network. At all Welsh Transport for Wales stations, Glyn does the Welsh translation of all the station announcements. He shares those stations with Ruth, who provides the English translation of the announcements. Glyn does not do announcements at English TfW stations.

He is the Welsh voice for Atos, as well as an TfW employee. Glyn, with Ruth, also have the record for the longest train announcement by duration - the 40 Stop Swansea to Crewe service via the Heart of Wales line. En route there are 40 stops, and since they both do the full announcement in their respective languages, it means the announcement is 80 stations long! It is not however the route with the most stops, as the Aberdeen to Penzance train holds that record with 46 stops.