Mabel - The Pirates of Penzance (The National Gilbert & Sullivan Opera Company

"Mabel sitting on a rock is absorbed in her book and ignores the girls’ activity until they rebuff the advances of Frederic. Mabel’s waltz aria is superbly sung with soaring top notes by Ellen Williams."

- Seen and Heard International

"It would be remiss not to mention the mesmerizing Welsh Soprano, Ellen Angharad Williams as ‘Mabel’. She was utterly charming on her debut performance with the company and she is certainly one to watch in the future. Her performances with the chorus girls was outstanding and her range of vocals incredible."

- North West End

"He commands the stage whenever he is present as does Ellen Angharad Williams as Mabel, whom he eventually manages to marry! Not only is she the embodiment of the role, her soprano voice richly compliments that of Nicholas Sales in duets, again having a superb (there, I have used that word) top register."
- The Operetta Research Centre

Plaintiff - Trial by Jury & Aline - The Sorcerer (The National Gilbert & Sullivan Opera Company)

"Ellen Angharad Williams made a delightful Aline (as she was Angelina earlier) and partnered Alexis ideally with her wide range and strength of voice."
"Ellen Angharad Williams offers two strikingly different portraits as the manipulative Plaintiff and the high-minded Aline." 
- Seen and Heard International
- The Stage
"The romantic couple, Alexis(Nicholas Sales) and Aline (Ellen Angharad Williams) are very believable, owing to their facial expressions, their heightened dialogue and their gorgeous voices."
- The Operetta Research Centre
Semele - Semele, Handel (Mid Wales Opera)
“Ellen Williams sang this demanding role with much poise and promise, her voice agile with silvery charm”
- The Guardian
“The Semele of Ellen Williams was sang with both grace and agility. Her interpretations of both ‘Endless Pleasure’ and ‘Myself I shall adore’ were among the highlights of the evening and revealed distinct promise”
“Ellen Williams sings and looks the part and “Myself I shall adore / If I persist in gazing” is a delight”
- Art Scene in Wales
- Seen and Heard International
I Loved You and I Loved You (Edinburgh Fringe Festival)
"Almost all of what we hear is Owen’s own work, either played live by the pianist Brian Ellsbury or sung with heart-piercing sweetness by Ellen Williams"
- The Times
Woman Composers of Wales: BBC NOW, Ty Cerdd, Bangor New Music Festival
"That Elwyn-Edwards and the tragically short-lived Owen wrote exquisite miniatures was evident at Mathias’ talk, which incorporated poignant live performances by soprano, Ellen Williams and pianist, Brian Ellsbury."
- Wales Arts Review