The trouble starts when Del persuades the local bus company to hand over one of their open-top buses in exchange for Rodney working as a Trainee Nocturnal Security Officer - part of their latest company, Trotter Watch. As part of the deal, Rodney has to suffer the nerve-jangling experience of patrolling the bus station on Tyler Street throughout the night. The next part of Del's scheme is the launch of Trotters' Ethnic Tours: a scenic tour around Chingford and Croydon, taking in such ethnic sights as the Lee Valley Viaduct. And despite a great deal of whinging from his family, Del persuades Rodney to drive the bus, whilst Grandad agrees to distribute the publicity leaflets. But when nobody turns up to the launch of Trotters' Ethnic Tours, it is revealed that Grandad shares the legendary Trotter business acumen and has posted the advertising leaflets through the dust chute of Mandela House.
—Rune Thandy