Resurgam

I caught a rehearsal by the vertical dance/acrobatic company BANDALOOP, the performers were spinning on cables, and dancing on the side of St Paul's Cathedral. It was part of the St Bartholomew's Fair, an entertainment event taking place in the city for three weekends in September. 
There are performances around the city on the Thursday, Friday and Saturday of each weekend. The first was around St Paul's, the second by Liverpool St station and Aldwich Square, and the last will be near the Gherkin and around Smithfield/St Bartholomew's church where the original mediaeval fair was held.
The website is here.