It's a tradition for some Londoner's to take an early morning dip in the Serpentine (the lake in Hyde Park). This is not just for anyone, they must qualify and spend several months before hand to win a place in this freezing dip. They are led out to the water by a piper playing "Scotland the Brave"
The line up - ready, steady.....
Jump, dive or slide in as your number is called out.
Then the thaw out. Every age has taken part of this crazy event.