Childhood: The youngster from West Yorkshire was born with cancerous tumours in her eyes and is largely non-verbal, left audiences stunned

Amazing: The teenager from Halifax in West Yorkshire moved viewers to tears as they watched in awe as the blind and autistic pianist recited the piece from memory

She started piano lessons with her teacher Daniel when she was three through the musical charity The Amber Trust.

He recalled previously: ‘I first met Lucy in ball pool at school and I couldn’t see anyone in the room at first. And then I saw this little hand sticking out of the ball pool.

‘And someone said “Oh that’s Lucy”.  So I put a little keyboard under the hand, and the hand started playing, rather mutinously, Twinkle Twinkle Little Star.

‘And I thought: “Here’s a girl for whom music is really important.”

‘And it could it be a way of unlocking her language, her social skills, and above all, her enjoyment of life.’

The family upgraded her keyboard and realised she was composing music in her head while sitting on the sofa. She was also able to play back music after listening to it just once.

‘From a fairy tale book with a piano on it, she started playing Twinkle Twinkle Little Star but it was pitch perfect. It was such a moment to hear that,’ Lucy’s mother Candice recalled.

Daniel said lessons weren’t easy at first as he had to figure out how to teach and make the most of her talent.

Wow: Here we take a look at the musician’s incredible journey – from when her music teacher Daniel first saw her ability when she played Twinkle Twinkle Little Star to performing on stage

Patience: When Daniel first started teaching, Lucy couldn’t listen to a piece for more than 10 seconds before she got impatient and would push his hands out of the way

Amazing: The teenager wowed passers by at Leeds train station with her rendition of Chopin’s Nocturne in B-flat minor last month, with the video being viewed five million times online

He said when he first started teaching, Lucy couldn’t listen to a piece for more than 10 seconds before she got impatient and would push his hands out of the way.

Now, he will play the entire the piece to her, before he asks Lucy to recite what she remembers she has had.

He said: ‘You can’t teach Lucy, you can only guide her in the journey.’

They teach the hands separately, with Daniel saying he has to physically pick her hands up at times so they can jump over each other.

The pair work together with Lucy putting her hand underneath Daniel’s, with Daniel still playing, pressing her fingers down gently before she tries the piece on her own.

‘She loves to improvise, she loves playing jazz and the social interplay of that’, he said.

Lucy reacts to the music with her body, especially her head and leg, which Daniel said he sometimes has to hone her energy to her fingertips.

The pianist, who was born with cancerous tumours in her eyes and is largely non-verbal, was put forward by her mother Candice forward for the competition as she wanted to show others how ‘amazing’ she was and raise awareness of her condition.

Lessons: Lucy started playing the keyboard when she was only two and started piano lessons with her teacher Daniel when she was three through musical charity The Amber Trust

The teenager wowed passers by at Leeds train station with her rendition of Chopin’s Nocturne in B-flat minor last month, with the video being viewed five million times online.

Since recording the show, hosted by Claudia Winkleman, Lucy has been learning more and more pieces by artists including Mozart, Beethoven, Schubert, Irving Berlin, George Gershwin, Duke Ellington and Stevie Wonder.

Viewers gushed over the emotional performance on Twitter when the final aired on Wednesday night, with one penning: ‘Lucy on The Piano has just made me an emotional wreck. How amazing is she!!’

Another wrote: ‘Lucy that might just be the most beautiful thing I’ve seen on TV ever. Well done you!’

A third added: ‘Lucy brought me tears of pure joy, what an amazing young lady, brilliant performance!’

One user said: The Piano is a beautiful programme. The piano playing of the blind girl Lucy was out of this world and profoundly moving’.

Another added: ‘Don’t mind admitting that Lucy on the piano has just made me shed a tear, not in sadness but pure joy at such an amazing talent’

One viewers mentioned her incredible teacher: ‘Let’s take a moment to give Lucy’s teacher a massive shout out – incredible’.

Judge Mika praised Lucy’s ‘jaw-dropping’ rendition of the song, and said: ‘Magical things happen with music that are against all odds and all limitations.’

The singer added: ‘It’s astonishing when it happens. When it happened in Leeds, when Lucy performed, it was jaw-dropping – it was the most humbling thing you could possibly see.’

Family: Candice said that she decided to put Lucy forward for the competition as she wanted to show others how ‘amazing’ she was and raise awareness of her condition