While visting London don't miss a legendary spring boat race between Oxford and Cambridge Universities. First raced in 1829, watch it on the River Thames in West London between Putney and Mortlake. Check schedule at http://theboatrace.org, here you will also find a map for the best viewing points along riverbank.
National Geograpic has listed Borough market in London as one of 10 top food markets in the world. London’s oldest food market—here for more than 250 years—is wholesale most of the week, but Thursdays through Saturdays it delights foodies with its cornucopia of fine foods from independent suppliers throughout the U.K.
At Horse Guards Arch, Changing the Guard takes place daily at 11.00 am (10.00 am on Sundays) and lasts about half an hour; it is normally held on Horse Guards Parade by the arch of Horse Guards Building. You can watch how twelve mounted troops in traditional costume arrive from their Hyde Park Barracks.