Not a snake but a Slow Worm, which is actually a legless lizard. This female was an unexpected sight – they normally live further down the garden.
Built in 1838 and used until the 1950s. It’s in remarkably good repair after a bit of tlc. Seen today during a visit with grandchildren.
I know I should remember why there is a blue chicken in Trafalgar Square, but I’ve forgotten. If you need to know I suggest you Google it!