We only had 4 hours to complete our tour so we put the itinerary in our driver/guide Paula's hands to show us the sights in central London that she felt we could comfortably do in our time available. Not only were we able to drive by well-known sights, she gave us a glimpse of some other not as well known places and historical tidbits that made the tour even more enjoyable. She also helped tremendously by negotiating an unexpected motorway closure and got us back to the airport in time to catch our flight, which we thought was going to be impossible. Highly recommend the tour and Paula.