Paul McCartney and John Lennon were an iconic songwriting duo behind The Beatles, with a competitive yet collaborative relationship. They each strived to write the best songs, leading to a healthy rivalry. "Penny Lane," written by Paul, and "Strawberry Fields Forever," by John, showcased their individual styles and childhood memories. Despite initial mixed reviews and commercial performance, these songs have since been recognized as masterpieces that defined The Beatles' avant-garde sound and influence on rock music. "Penny Lane" continues to be celebrated as a vivid and magical portrayal of suburban life in Liverpool.
Source: https://www.liverpoolecho.co.uk/news/liverpool-news/paul-mccartney-wrote-classic-beatles-31867409