This is one of a series of increasingly tenuous, easy caches celebrating Rickmansworth's musical connections.
Natasha Khan, stage name Bat For Lashes, went to school at St. Clement Danes, around the corner. Her hits include Daniel and Pearl's Dream. Her live shows are reportedly spectacular, though irritatingly I've never managed to see her.
Before the school's current incarnation as a mixed comprehensive, it was a boys' grammar school in Hammersmith. The Sex Pistols' original bass player, Glen Matlock, went to that school. If it wasn't for Natasha Khan, I would have titled this cache The Sex Pistols.
Magnetic nano - you will need a pen. There's nearby parking.
Please don't replace it too high up.