Britwife,
thank-you for taking the time to reply to my post, you were very helpful. Today we booked a b&b which is a short taxi ride away from the embassy, they also have parking so we have decided to take our car as we will be loading it up with baby stuff, you know how that goes. I doubt we'll drive around London as we are centrally located to everything, taxi's will work just fine.
Thanks again!
Joanne & Hope