K is for Keston

LONDON A-Z K is for Keston My next alphabetical destination is Keston, a rural suburban outlier not to be confused with Kenley which was never in Kent. We're in the London borough of Bromley where things tip over from avenues to country lanes, further out than Hayes but not as far as Biggin Hill. Keston has an exceptionally ancient history, also one of London's handful of windmills, also biodiversity that Darwin appreciated, also the former homes of two of our most consequential Prime Ministers. It's also impressively unfocused so expect a lengthy wander. The key thing about Keston is that it's where the River Ravensbourne begins. The waters emerge from a natural spring at the top of the common, this at the point where the overlying gravels meet the impermeable clay underneath. It's called Caesar's Well, based on the easily disprovable legend that Julius Caesar's men paused here in 55BC after being led to a source of water by a raven. Did not happen. This was however the source of…