Quick and simple drive by. Be aware of muggles and it may be beneficial to sign the log away from where you find it.
Fettler is the nickname of the Gentleman who could be looking out of the flat on Fieldhead gardens. If you see him be sure to wave to him and his wife.
It is not a typical cache container, by which I mean a camera film tub, a nano or tupperware box so be extra vigilant and disregard nothing.
Happy hunting
Srggyre nyjnlf jnf n ovt ebyyvat fgbarf sna.