I previously posted a question about my 22 year old daughter traveling alone next summer in London. She wants to spend 3-4 days seeing the major sights. Unfortunately her dates are within the Olympics time frame. I had asked about any tour companies that might do short term tours. I have found that Contiki has a 4 night, 5 day London "Explorer" tour that includes lodging, a trip to Stonehenge, tube tickets, a musical play and time off on your own. Seems like a great way for her to see the sights but not be completely on her own as they specialize in tours for young people. Does anyone have experience with Contiki Tours? Any advice or suggestions? Thanks!