This letterbox hybrid cache is not at the posted coordinates, but this is a good place to park and start your adventure.
Briefkasten is the German word for letterbox. Welcome to this new series of London Letterbox caches honouring many different countries and languages around the world. This cache contains a stamp that is not a trade item and should remain with the cache.
From the listed coordinates, you will be hiking west towards the parking garage. You can find the final cache coordinates by projecting a waypoint 142 m away, at 268 degrees true.