I don't want to worry you, kjm, but Chertsey is currently under a severe flood warning from the nearly overflowing Thames and a few million gallons of rain in recent days.
The South of Britain has had record rain levels....and records started in the mid 1700's!
The whole stretch of the Thames from Windsor right down to Chertsey is at risk of overflow at the moment, with more heavy rain forecast.
If you check out the BBC weather website and our news website, you will see what we've been squelching about in since about Christmas.
I live about twenty yards ( thankfully uphill) from a 180 acre park, and have just come back from walking the dog. The area just inside the main entrance now resembles a big lake. We actually had swans swimming about there today. Very scenic and quite a novelty, but the neighbours who actually border the park are currently sandbagging the airbricks round the bottom of their houses.
If you DO come to look around and rent/buy somewhere, it would be wise to think about getting somewhere that is at least twenty feet above river level. There's no major emergency where we are ( not like the poor devils down in Somerset), but there's enough unusual water level to make one think about ever living on a flood plain in future.
I'm now going to find some dry socks and dig out the dog's towel, before he shakes himself all over the living room.