Shortly after Kevin O'Grady (Spike Milligan) moves into his new flat his boss Mr. Blenkinsop comes to ask how everything is. O'Grady calls him Mr. Sykes, which is in fact the name of the actor, Eric Sykes.
Just before Kevin O'Grady calls Mr. Blenkinsop "Mr. Sykes", Kenny (Kenny Lynch) comes in and also refers to the real name of the actor, saying "Hello, Eric" instead of "Hello, Arthur".