This is not a fast pass/ front of the line pass at all. We still had to wait in line and purchase tickets and then enter just like everyone else. When lI asked the Tower of London about this, they said they cannot offer fast passes because everyone goes through a security check.
THIS IS A PASS, NOT A TOUR. KENSINGTON PALACE IS OK, NOT GREAT. THE TIME AND COST IF TAXI IS VERY SIGNIFICANT. TO GET TO ALL 3 SITES. WE WOULD, IF WE DID IT AGAIN, WOULD BE JUST TO BUY A TOWER OF LONDON PASS. WE COULD MISS THE OTHER TWO SITES.
The tickets read and printed, last entry 5pm Tower of London. as we approached a little after 4pm the guard who accepts tickets said, they lied to you as he laughed. 4pm is the last entry. We bought this and never were granted entry. Also this time of the year there are no lines, so better to buy at location. It would have saved quite a bit on the price paid here.
This is a great option because you don't have to plan ahead for when exactly to visit. It worked great for my family. We knew we wanted to see them all just dod not want to have every minute scheduled.