Man Utd v Man City: heavy rain provokes Old Trafford waterfall

The northwest of England is used to heavy rain, but the intense precipitation ahead of this evening's Manchester United - Manchester City derby was too much for the drainage system on the roof of Old Trafford, which led to an almighty waterfall pouring off the roof onto the seats below.

This evening's tie could well decide the Premier League title, with Manchester City needing to win to move ahead of Liverpool and into pole position to reclaim their crown.