|Subject: Re: London|
My suggestion would be to take the bus tour of the city. That will help give you an idea of what to see, plus you can hop on and off for a day. I always start my travels with one - it helps get the lay of the city, and some info on the attractions. It goes by the major sites, and it can help you organize what to see to get the most out of your four days.
Marguerite in Chicagoland