Speaking of Rags in London, when I taught there in the late 90's the majority of the kids I taught claimed to support 'Man Yoo'. I remember the year when we were in the old 3rd div and I was going to all the games down in the South East. I had a big City banner up in my classroom so all the students knew I was a Blue. Anyhow.....
One day I was takin a Geography cover for Year 11 (That's 5th year to all you old folk) and this Cockney rag was giving it the large one when I walked up to the door and carried on when I was inside. I noticed behind me a huge map of the British Isles behind me, this thing was enourmous, so I walked over to it and said:-
'OK, Big Mr Manchester United fan, can you point out Manchester for me?'
The cocky little git walked up bold as brass and pointed to his spot and said 'Here'.
My only response in shock, amazement and laughter was 'Sorry mate, that would be Tipperary in Ireland'
All was quiet for the next hour :o)