Prankster repeatedly hijacking radio station broadcast with masturbation ditty

The UK's Office of Communications is pursuing a pirate radio prankster who has interrupted the Mansfield 103.2 broadcast eight times over the last month. He cuts into the regularly scheduled programming with the below tune from 1978, "The Winkers Song" (1978) by Ivor Biggun. From The Guardian:

Tony Delahunty, managing director of Mansfield 103.2, said: Some people have told me that their children have started humming the song in the car.We have had calls from people who have found it hilarious, while some have raised their concerns, including our competitors, and a lot of people in the industry are aghast at how difficult it is to stop these people...."

We are told by Ofcom who are investigating the matter, that you only need, and this is the frightening thing, a small transmitter and if you can get near where there is an outside broadcast or a signal and you can overpower that signal [and] youre on the airwaves.

https://www.youtube.com/watch?v=D1xpUbAtcZA