Paul McCartney recently paid tribute to the late producer, saying: "I have so many wonderful memories of this great man that will be with me forever. He was a true gentleman and like a second father to me. He guided the career of The Beatles with such skill and good humour that he became a true friend to me and my family."

Martin died at home aged 90 earlier this month. Affectionately known as 'The Fifth Beatle', the music mogul famously signed the Fab Four in 1962 and produced all their hit singles.