We had not pre-booked tickets, as they were sold out by the time we looked, but once we got there, my dad decided that we wanted to go up.
So, we queued for tickets, and then for the lifts, and then we went Up a Very Tall Thing. Which is always fun. (Well, it is for me. I like Very Tall Things). There were views, letting us play 'spot the famous landmark', plus you get to peer down at people below. Did I mention that I like going up very tall things? Having gone right to the very top, we then came down to the lower levels, including walking on the new glass floors at level 1 (which wasn't an option last time I visited) It gave more opportunities to look down at all the people still queuing, down below!
Then back down, just in time to eat crepes and avoid being rained on. Which I think counts as a win all round!