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Words from Leo’s lovely singers past and present


Gloria Onitiri

Leo’s understanding of the voice as an instrument is so finely tuned and resonant. Over the last year working with her I’ve had the opportunity to benefit from her wisdom, unfailing enthusiasm, generosity, friendship and support. Her breadth of knowledge, insight and passion for the voice is second to none and I am without doubt a much more developed vocalist because of it. I am very grateful to get to share in the delight of making music with her right now and hopefully for many more years to come!


Nic Doodson – Producer Gobsmacked!

As a performer I was lucky enough to meet Leo and she not only transformed by voice but also my confidence and entire approach to singing. As a producer, when I was creating Gobsmacked! the only person I would trust to guide my cast through an all vocal show was Leo. She worked with every one of my cast individually and gave them not only brilliant direction and training but also the information and tools to be able to look after their voices for 8 performances a week. If you want the best in the business, ask for Leo Hass.


Alice Stokoe – currently playing Sophie in Mamma Mia West-End

Leo has an incredible knack of understanding individual voices and knowing what needs to be done for them to improve. She explains things in a very clear, understandable way, meaning you come away from every lesson having learnt something new and invaluable. Having completed the part time Musical Theatre course at Associated Studios and also had individual coaching with Leo my confidence has improved massively and I would not hesitate to recommend them both.


Vangelis Polydorou

I just wanted to say a massive thank you to Leontine Hass. She has helped me so much with my voice! After just a few lessons i’ve noticed a dramatic improvement. She has taught me to take risks and be brave and i wouldn’t have been able to do ‘The Voice’ without her. So thank you once again for being an honest vocal coach and for pushing me further than i ever thought i could go! I highly recommend her.


David O’Mahoney

Since doing the first Associated Studios course I went from strength to strength – I secured a great new agent who I’ve been with for many years now and who I count as a friend and a rock… and have now wracked up two West End contracts, an Arena tour around America and I know there’s still great things ahead. Leontine and the directors, MD’s and choreographers from Associated Studios have remained in my life as friends, mentors and as fellow professionals.


Ashleigh Flemming

What I’ve done since Associated Studios and working with Leo

In 2010 I landed the role of Sister Sophia in The Sound of Music UK Tour (David Ian/Really Useful Group) where I toured the UK for a year and a half. I also went on to play Sister Sophia in further productions in Bahrain and Doha for Popular Productions.

From 2012-2014 I landed my dream job as Christine Daae cover in The Phantom of the Opera, Her Majesty’s Theatre, London where I was lucky enough to play the part over 70 times.


Eleanor Brown

In the short time I have been working with Leo I can already feel the improvements in my voice. Not only has she clarified the mechanics of singing for me, but her lessons are also building my confidence as a performer. Her teaching methods are clear, honest and encouraging, and have instantly brought me results.


Douglas Hansell

Having worked professionally as an actor and a singer/musician for over ten years I have had the opportunity to study with some remarkable mentors. None have unleashed the passion, joy, focus and clarity of sound that Leontine Haas has by virtue of her extraordinary breadth of knowledge, vast experience and her ability to immediately assess and tap into an individual’s vocal potential. Under her guidance, I have transformed from an actor with a good voice into an integrated singing and acting artist who can now work across mediums. My debt of gratitude to her is boundless.


Rosemary Annabella

Leo is so much more than a vocal coach – she’s a life coach, she gives wise counsel, at times she’s even an agent – always happy to make those connections when she can. There’s a holistic approach to her method of teaching that I really appreciate – a rarity among vocal coaches. Most importantly she is able to help you unlock the potential inside which in turn empowers you to sing and perform with confidence.


Gabriel Vick

Leo is more than a singing teacher – she cares about your career and will offer help with every aspect of you as a performer. Not only has she taught me technically how to sing better where other teachers have failed, she has also helped me enjoy singing again.


Esme Sears

Since starting lessons with Leontine I have found a greater joy and love in my singing and the ability to relax more when performing. Leo has truly helped to transform my voice dramatically and because I now understand more about my voice’s abilities and strengths it has helped me to become a more confident performer.Leo is a fantastic teacher with a supportive and patient nature and knows exactly how to enhance your vocal ability in preparation for a variety of performing jobs. I trust and value her opinions and knowledge of the performance industry.
I feel so lucky to have found such a fantastic teacher… I can’t thank her enough for her guidance and feel proud of my achievements so far.


Ayanna Witter Johnson – Singer-Songwriter

“Since studying with Leo, I have developed a much deeper understanding of how my voice works.  And having followed her exercises, can feel a new and more powerful voice emerging.  One I’ve always dreamed of having. Leo is the best!”


Angela Nesi

‘A singing lesson with Leo is always a good workout! She knows exactly how to push and develop my voice and get the best out of it and I always seem to come away having had a new revelation. She really is the only teacher I’ve had who has been able to explain vocal technique in a way which I can connect to.’ Angela Nesi


Jamie Lambert, 2014 winner of Britain’s Got Talent in ‘Collabro’

“I’ve been under Leo’s wing for a year and a half now and she truly is a great teacher – she not only develops your vocal technique, but also personally supports you and makes your lesson a safe environment. I couldn’t recommend her more. Since winning Britain’s Got Talent she has been a constant source of support both vocally and as a friend” Jamie Lambert


Rachael Ward – currently playing Bombalurina in Cats

“It’s amazing how one person or one thing can make such an impact for the good in someone’s life.This is what the past five months have shown me.Through Leo’s vast knowledge of the voice, she has guided me through various exercises that have transformed my singing and instilled a newfound confidence in my ability.I without a doubt would recommend Leo for any vocal coaching and or advice in the area of singing.She is not only a great voice coach, but person also.” Thank you Leo.Your Student,Rachael


Christina Modestou as Killer Queen in ‘We Will Rock You’

“Leo is an inspirational vocal coach. She is very honest but encouraging. I trust her judgement and she makes me feel like nothing is impossible. I can take any song to a lesson whether it’s something I struggle with or not and she brings out the best in me. With Leo I always strive to be better, she makes me want to practice to be the best that I can be.” Christina Modestou


Waylon Jacobs as Simba in Lion King

“Leo saved me when I was having vocal problems. She returned my confidence to me and we seem to discover new things about my voice in every lesson.”Waylon Jacobs


Calvin Christo Grandling

Since working with Leo my tonal quality, range, and overall singing technique has greatly improved. Leo is a respected in the field and one who works patiently with her students to help them achieve their dreams.


Matt Brinkler

I’ve never come across a singing teacher with such a good awareness of the industry. Not just a fantastic technique teacher but also a great career advisor.


Samantha Smith

I met Leontine Hass at an audition and master class that she was running for musical theatre singers and actors who were looking to improve their vocal skills and increase their repetoire. From that initial workshop to the many that I have attended, I have been so empowered and challenged in so many ways by her vocal expertise and experience. My confidence has grown immensely as well as my vocal range and my acting ability.

I know without a doubt that going to her weekly classes has allowed me to develop into an all round better performer and singer. I remember specifically an audition that I had for a West End musical. After several recalls and after having a singing class with Leontine the night before that final audition, it boosted my confidence level to such a degree, that I walked into that final recall audition fearless. She is a remarkable teacher and friend that sees your potential before you even recognise it within yourself.

I wouldn’t hesitate to recommend Leo for any job that requires vocal coaching, directing and staging. One of the best Vocal Coaches out there, definitely!