I am looking at some of the tours to purchase that promise no wait to enter Westminster Abbey and The Tower of London. However, I'm confused because both offer online Fast Track Entry tickets. Any thoughts on how fast is "Fast Track Entry"? Does the time of day impact Fast Track Entry in late June?
In Barcelona, we bought Sagrada Familia with guided tour tickets for 27 Euro each (vs the basic entry ticket for 17 Euro) in the middle of day in the summer. We walked up to a mob scene but were able to walk right in because we had "Fast Track Entry" tickets with a guided tour.