The cache is not at the above coordinates. In order to solve this puzzle you will be required to have the "Geocaching Adventure Lab" app on your smart phone and visit all five stages of "Explore Birtle's Heritage". Each stage will give you a number to solve the coordinates. The information is stored in the Journal entries on the app.
The final coordinates are N50 25.ABE W101 02.CDE
Cache contains logbook and pencil, Birtle Postcards and some pens and has been placed with permission. Please place back out of site.