Julian Lennon has opened up about his diagnosis with coronary heart disease, and urged people to “get checked out sooner than later”. READ MORE: The Beatles: every song ranked in order of greatness The 63-year-old musician and documentary filmmaker is the son of Beatles icon John Lennon and his first wife Cynthia. He took to social media over the weekend to speak out about his recent health battles, revealing that he has been diagnosed with coronary heart disease and told he is a pre-diabetic. Posting a carousel of images, he shared his hopes to raise awareness for the illness and wrote: “I urge you all to get checked out sooner rather than later. You never know what hidden health issues you may have, even after exercising and eating as much ‘good/healthy’ food as possible.” “Nip it in the bud!…