The term “nepo baby” thankfully didn’t exist when John Lennon’s eldest son, Julian, began his recording career over 40 years ago. If you weren’t around back then, it’s worth bearing in mind that Julian Lennon’s debut album, 1984’s Valotte, was released less than four years after his father’s murder, and, as such, interest was extremely high. People keenly wondered what this 21-year-old – the spitting image of his legendary dad – would have to …