There is an old clock named Big Ben/
That used to ring in News at 10/
It chimes every hour/
Up high in a tower/
Which gets a new name now & then.
///
http://www.bbc.co.uk/news/uk-politics-18592966
NB As you all know, Big Ben is the name of the clock, not the tower!
About twitmericks
There is an old fellow called Mick/Who's been penning the odd limerick/I admit he's no Keats/But he does them in tweets/So to follow, you just have to click. https://twitter.com/#!/twitmericks
"The limerick master of the twitterati" (The Guardian).