I haven't been to the Tower since I was junior school age, only to see the outside Compared to things around here it's good value tbh.
If we have time after and the weather's good (which it will be of course), a wander along the Thames is lovely, there's Tate Modern nearby, or just go across one of the bridges, like the Millennium. I love being on a bridge, you're somehow removed from the rest of London...
I had a look at the website and it says you can see the poppies from Tower Hill without paying the entrance fee. That is good as I am going with a friend in October, and we have a day out on a budget
That walking tour looks lovely Mm, BB and I have done a lot of it
The poppies were after all our main point of going (as well as actually meeting each other of course); I'm saving about £60 on the normal train fare so I'm more than happy