Behind the Breymann Redoubt, stop C, for the Wilkinson Trail, could maybe be the exclusive Boot Monument. The boot in question belonged to American battle hero Benedict Arnold (before he switched sides to the British). ...
Other possibilities worth a try are the Black Sheep, The Roebuck (I've never been there but may try it next time), The Fentiman Arms (quickest route there is to cut through the estate) and, if you wander up to Kennington Cross, ...