Not a patch on "Radio Harry"
Back in the early 1980's, I used to listen to the sports programme on BBC Radio Bristol. One weekend, there was a problem with what sounded like someone having a conversation that started to overlap the presenters. Eventually, they stopped the radio broadcast and we could hear someone having a phone conversation coming out of the radio.
It turned out that BBC RB sent their signal across the city to a mast on the outskirts; something went wrong in the exchange and some poor chap called Harry ended up with his phone calls going out on the transmitter.
It was made worse because he answered the phone with his telephone number; so of course all these sad people started to phone him up - he couldn't understand what was going on. When he was told that he was being broadcast, he burst into a quick refrain of "Rosemary". About half an hour later, he started to get calls from people asking him to sing a bit more!! This all went on for about an hour.
Eventually, they managed to sort the problem out - no more Harry. The presenters were a bit snotty about it; they then started to get complaints that Harry was better than them, so they quickly dropped the subject.
However, the bosses at the Beeb saw the funny side - later that year they did a Christamas concert and Harry was asked if he wanted to take part - they dressed him up in a mounties uniform and he had to serenade one of the female presenters! The whold incident was referred to as "Radio Harry" and was the subject of a great number of local jokes for many years after.