Superintendent Watson's office at venerable Ireland Yard is a redressed version of Commissioner Gordon's office, with a portrait of Sherlock Holmes hanging behind Watson's desk. Ireland yard is a pun on Scotland Yard, the headquarters of London's police force.
Maurice Dallimore had earlier played the British United World Delegate in the 1966 Batman movie, and Sir Sterling Habit's in The Bat's Kow Tow.
Alfred arrives in an authentic, iconic London taxi.
Londinium is the Roman name for London.
Bruce tells the drumming Dick Grayson to "Cool it, Ringo!" as he answers the Bat Phone. This is a nod to the iconic Beatles drummer, Ringo Starr. In fact, the whole story arc capitalizes on recognizable aspects of the British Invasion.