A friend of my brother & me used to insist that ITV was called BBC3.
Most people in the UK tune this channel to the 3rd preset on their TV, which I guess confused him.
A childhood belief about tv

others believed things like this
- I used to believe that people from Holland were called "Hollish", like people from Poland are called "Polish"— Sally
- When my friend told me her cat was moulting I thought she said melting. I was confused for a while.Anon
- if you pick your nose, there will be a tune from itAnon
- I used to believe that tv people were tiny famous people that lived inside that box with a window called TV.— Miguel Horacio
- When me and my brother were kids we used to think that Jim'll Fix it's Jimmy Saville was called Jim'llAnon
- My brother was terrorised by an imaginary charecter called anorak doo-dah— Corin