Doctor Alex George has paid tribute to his younger brother Llyr on what would have been his 20th birthday.

The youngster tragically lost his battle with mental health last July, just weeks before he was due to follow in Alex's footsteps and start medical school.

Alex has since become a staunch advocate for mental health education and earlier this month was appointed by Prime Minister Boris Johnson as the government's new youth mental health ambassador in an attempt to effect change.

Taking to Instagram on Friday, Alex posted a throwback picture of him with Llyr at his graduation several years ago alongside the message: "Today would be your 20th birthday. You were 14 in this picture.

"I remember how proud you were of me graduating as doctor. You ran up to me after the ceremony with the biggest smile.

"I was so excited for you to follow in my footsteps, you would have been the most amazing doctor. Although I would never admit it to you, in honesty you were the smarter of the two.

"We are ten years and four days apart, this was supposed to be the start of your 20s. You would have loved medical school and gone on to achieve so much. The very kindest of souls.

"We had so many plans for road trips, adventures and enjoying cars. I think about you every single day my boy.

"It is impossibly hard at times, we miss you so much as a family. I have always been so proud of you. I hope you are proud of me. Love you my boy x"