Gavin was an excellent tour host. We learned about the Changing of Guard and its history plus other historical information. Gavin also shared that the Queen was in town for an event at Westminster Abbey that day and her ceremonial birthday the following day. We ended up seeing the Queen and Prince Phillip depart Buckingham Palace shortly after our tour and attending the Trooping of the Colour on Saturday, June 9, 2018. Our short stopover in London was priceless since we got to see the Queen during both days of our visit!