The leaning tower of… London?

According to the BBC News website, MPs are meeting to discuss how to stop Big Ben leaning.

Now look at this photo I took of the Clock Tower (one of my favourite buildings in London).  Is it evidence of the lean of Big Ben?  Or just a rubbish photo?  (According to the article, the Tower leans to the left when seen from Parliament Square which (I think) would be the way it appears to be leaning in this photo.  So who knows?)