To bring the triangle full circle

1. What does the green sentence mean?

2. Do "working" and "their" in the red sentence refer to "Sebastien Foucan et al."?

3. Does the yellow sentence refer to "jump London" or "Event Horizon"? I think the former. Am I right?

To pursue the conversation on triangulated conversations, Creed’s Work No.850 seems also to shout down the road to Gormley’s artwork One and Other for Trafalgar Square’s fourth plinth in both its durational and time-based aspects: a prolonged series of short-lived, living portraits or performances, involving a controlled regime of rotating, signed-up members of the public.
Gormley’s plinth which effectively will have offered members of the public the opportunity for just one hour to ‘perform their own space’ in the city – to take themselves outside of themselves or be both ‘one and other’ – seems, in turn, to act as a playful interlocutor for his own major 2007 installation Event Horizon over the river at the Hayward art gallery. Or, more accurately, precisely not at but around the Hayward. This was an ensemble of some 30 human-size – or at least Gormley-size at six foot four inches – fibreglass or cast iron standing figures, dotted mainly in and around the rooftops of London’s South Bank Centre complex, though a few found themselves on the other side of the Thames and some were ‘grounded’ (on Waterloo Bridge, for example).
To bring the triangle full circle, as it were, I could not help – being familiar with the footage – but be reminded uncannily of Sebastien Foucan et al. in Jump London, working over the very same terrain with their stunning turns: a similar calibration of the human figure – of human size – in relation to the built environment of the city.