We really enjoyed going on the London Eye, unfortunately it was an overcast day but at least it didn't rain. Our guide was very informative and helpful, the time went so quickly and you didn't even feel like you were moving around. Thoroughly recommend Viator

Our guide David was just excellent, he was so informative and had a wonderful sense of humour. Got an added surprise at Windsor Castle to see the Changing of the Guard. I felt we were a bit rushed and would have liked a bit more time for buying souveniers etc at Windsor Castle. Also it was quite surreal to walk through the state rooms at Buckingham Palace. Would highly recommend Viator.

Even though there was no queue for tickets, it was nice to just walk in, having booked before we left for our trip. It was very interesting to see