Sleepless in Peckham at the sight of it, and Boycie and Marlene are tricked by Sid into paying for everyone's drinks. With only a few days left before the Trotters are evicted from Nelson Mandela House, Rodney gets an enlarged copy of the 1960 Jolly Boys' Outing photo and shows it to Cassandra at a restaurant. He shows her who was in the photo: Del, Boycie, Trigger, Denzil, Sid, Roy Slater, Grandad, Reg—and local gentleman thief Freddie "The Frog" Robdal, (pictured as Nicholas Lyndhurst) who bears an uncanny resemblance to Rodney. Rodney then tells Cassandra that Robdal is his biological father, explaining the
Del Boy Boy at 15, before Rodney has been born. This is confirmed when the teacher complains about the boys having to stay at school for another year because of a change in the law. (The school leaving age in the UK was raised to 16 in 1972.) This, however, is inconsistent with "Big Brother" (Series 1, 1981), when Del states that he is 13 years older than Rodney. If this were so, Del should have been 12 or 13 in "Rock & Chips". The 2015 novel "He Who Dares..." confirms that Del was born on 10 December 1945. Del Boy works