This is the Bonus cache to the Adventure Lab 'Going Postal', celebrating the variety of post boxes and their royal cyphers that are found in the UK. Be aware that some travel is required for the Lab cache and the difficulty of this bonus reflects this.
In order to get the coordinates for this cache, you will need to complete the various stages of the Adventure Lab and enter the details given upon completion into the formula given at the bottom of this page.
How to access the Adventure Lab:
The associated Adventure Lab contains five locations which all count towards your geocaching statistics and total finds. To get started first download the Adventure Lab app onto a smartphone, which I would recommend doing prior to leaving home.
For Android phones it can be installed here
For iOS phones it can be installed here
Once the Adventure Lab app has been downloaded onto your smart phone, sign in using your usual Geocaching details, then either use the ‘Discover’ or ‘Explore’ option on the app to select the Adventure titled 'Going Postal'.
You can also use a QR code scanner on your mobile phone to scan the code here.
This cache can be found at N51° 4A.(CxD)-4 E000° 2B.(DxE)
If you are aware of any unusual post boxes, i.e. an unusual design or rare cypher, then please do note them in your log!