Y Briodas Fawr (participant)
I'm a Celebrity... Get Me Out of Here! (participant)
Your Country Needs You! (team captain)
ITV weather presenter who's turned her hand to various other hosting jobs (including a stint as an S4C continuity announcer) and generally being a C-list celeb off the telly.
Not to be confused with the BBC Wales newsreader Sian Lloyd, who as far as we know, hasn't done any game shows.