I've decided to go to this circus mostly for my little son. Overall, I've found the circus generally OK but not something that really worth the £27 adult ticket. I've seen many different circuses in the past since I was a kid (I was born and raised in a Southern European country); including some very big ones like Medrano which as far as I am remember It always had big animals, such as elephants, tigers, etc. This one has NO animals but rather concentrates on different acrobatic stunts.
For what I've seen I think UK citizens are more or less ripped off for entertainment, as for comparison I include the prices for the Italian Circus Medrano (probably the biggest in Europe) for their performances in Cyprus (their 2008 tour): Category VIP adults was €25 and for Kids €15; while category A’ adults was €20 and for Kids €12. ....So, you may now understand why I consider this circus in UK to be a rip off!
Anyway, my son loved it and this is what mattered for me! For a bigger/better...and, cheaper one...he should wait until we go to Southern Europe for holidays next summer.