Downstream

become a business, but
balance this with the fact
many people swim to raise
money. And this is the second
biggest difference when it
comes to swimming the
Thames, that a lot of us do it
for charity. A decade ago few
charities offered swims as a
way to fundraise; now most
do, in lakes, the sea, indoor
pool swimathons and, of
course, the Thames. People
use Facebook to link up with