Here is her blog of the rides so far: http://livingadventurously.wordpress.com/
So come and join her on the Croydon ride, and explore the green spaces at the edge of this outer London borough.
It's a 42 mile anti-clockwise loop from Norbury stn (well it IS the 2nd largest London borough i.t.o. area!), leaving at 10am on Sunday 8 Aug. Expect quite a few hills
(especially across the south of the borough) and some off-road sections unless monsoon rains arrive in the next few weeks. Lunch is likely to be at The Fox (pub) on the edge of Coulsdon Common. 
Hope to see you on the ride.
Cheers
jim