Originally from Anglesey, Siôn Tecwyn has been a journalist for over forty years. Starting as a trainee with local newspapers in Gwynedd and Anglesey, he then joined BBC Wales in Bangor, where he worked as a reporter, mainly for Welsh language news programmes. He covered the investigation into the murder of Gerald Corrigan and subsequent court case. Siôn was also one of the first journalists to report on what later became known as the Post Office Scandal.