Some interesting ideas. You lead from the back - so someone else who knows the route essential. You ride 2 abreast at all times - going to be interesting on some of the Southwark roads, or on the narrower cycle paths. At junctions leader sprints to the front and sees group across/around. OK except where there are a lot of turns.
I have to be an ambassador for Sky at all times. OK as long as I can make it clear that I hate them, News International and all their works....
Now I await my free hi-vis jacket, after which I can sign up to lead a ride.
Meanwhile, Healthy Rides will continue unabated.