Mary absolutely hated knock knock, and hated Eurovision because of it. Having to smile through a song she loathed with a passion. She was promised credible songs for viewers to choose from and agreed to take part on that basis. In the end Mary got a piece of inane faff.   It's a subject that still rankles with her.

The friends of Dorothy now own Eurovision and have long since turned it into a campfest joke. Two years running overtly gay acts with castrati type voices have won it. The song is now mostly incidental to the act and staging, and the songwriters are no longer of any importance in the ethos of the competition.