18.5m above sea level
Pics from the other day, Walton-on-Thames just down the road from Mike, and banks broken at Hampton Court, we were watching it the other day and it was really flowing, if anyone went in, they weren't coming out!
http://www.dailymail.co.uk/news/article-2555658/UK-weather-16-areas-South-warned-flooding-danger-lives-Armed-Forces-battle-save-homes.html