thanks to earlier Tripadvisor reviews, we planned our visit in the late afternoon when most of the crowd would already have left. In summertime, you can still start your visit until 19h00..
This seemed to be a perfect plan; with plenty of time and room to make all the pictures we wanted, this 2h visit surprised me in a positive way. (Originally it was our teenage daughter that convinced us to do this 'expensive visit'). Tip: look for combi tickets with for example 'the London eye' and family combinations; you can save quite some £££
Proved worthwile in these circumstances, the 4D movie in the end is a nice apotheose as well.More