We walked to the Tower Bridge after we were done with the Tower of London. You can just walk across the bridge, making photos. Or you can buy the Bridge Experience Tour to fully enjoy this attraction (I assume this tour is also included in London Pass). Within the tour you can go by lift on the top of the bridge where you can enjoy amazing London view. This view might be a best part of your bridge tour. The platform on top has a glass floor, so you can see down to the street, Thames and the bridge. Also you can visit engine room to see part of the bridge's operating mechanism. The Tower...

We walked to the Tower Bridge after we were done with the Tower of London. You can just walk across the bridge, making photos. Or you can buy the Bridge Experience Tour to fully enjoy this attraction (I assume this tour is also included in London Pass). Within the tour you can go by lift on the top of the bridge where you can enjoy amazing London view. This view might be a best part of your bridge tour. The platform on top has a glass floor, so you can see down to the street, Thames and the bridge. Also you can visit engine room to see part of the bridge's operating mechanism. The Tower has an exhibition display, explaining details of its building and maintenance. Going on top and inside the bridge probably is not something you have to do when you are limited with time. Just crossing it and making photos would be also enjoyable. But if you want to have the Bridge Experience, prepare another 45 minutes. When you finished with the bridge tour, I suggest you to walk to the South Bank of the river, where you can take a great photos of the bridge and London Tower. Must to see attraction in London and highly recommended!