Wednesday was such a gorgeous day in London. While my kids were at school, I decadently hired a Barclays bike and rode from St John's Wood through Regent's Park to Marylebone. I love riding along the outer circle of Regent's Park — I feel like it's one of the few areas I can bike and not fear for my life!
I would put "a casual bike ride in London" (on a sunny day) down as a must for anyone living in the city. My simple, non-scary ride along Regent's Park made me so happy to be in London.
Have you registered for the Barclays bike scheme? What do you think of it? I've found it's really helpful for the odd bike ride, but haven't used it extensively.