Llyr was educated at Ysgol Bro Myrddin and Aberystwyth
Llyr began his career as a youth worker before moving on to
work for the Wales Youth Agency and the Council for Wales of Voluntary Youth
Services. He later became a project manager for an economic development
Llyr has also been a Management Consultant for the National
Trust in Wales.
Llyr stood for the Carmarthen West and South Pembrokeshire
seat at the Assembly Election in 2003. He stood for the same seat at the 2001
General Election, and for the Clwyd West seat at the 2010 General Election.
He has been a Carmarthen Town Councillor and the town Mayor.