'Allo 'Allo:
'Allo 'Allo! is a BBC television British sitcom. The story is set in a small-town café in German-occupied France during the Second World War. It is a parody of another BBC programme. The wartime drama Secret Army.
Set during the Second World War, 'Allo 'Allo! tells the fictitious story of René Artois who is a café owner in the town of Nouvion, France.
René's café is being used as a safe house for two brave but clueless British airmen; Fairfax and Carstairs. René is forced to work with the French Resistance; led by the fearsome Michelle Dubois. The far-fetched plans of the Resistance to get the airmen back to Britain fail repeatedly.
As part of these plans, the Resistance have placed a radio in the bedroom of René's mother-in-law, Madame Fanny La Fan, because this is the only room nobody enters unless they have to. This secret device for communication between London and the Resistance (codename "Nighthawk") is hidden under the bed. Incoming messages are signaled by flashing light bulbs concealed in the bed-knobs. René answers with "'Allo, 'allo, zis is Night'awk, are you receiving me?" Hence the title of the show.

Finding the cache:
You need to take on the role of René Artois, and contact London;
For this, you will need a PMR446 walkie-talkie;
Tune it to channel 5 and select the CTCSS 118.8 Hz option (this is security code 17 on many PMR446 radios) for both transmit and receive;
Now go to the published co-ordinates and use your PMR446 walkie-talkie to call London;
- You may need to talk loudly in order to be heard;
Once heard, you will be told what to do next.
If you aren't heard, then hold the walkie-talkie in the air when receiving and / or move to a different location, e.g. N 50° 47.080 E 000° 19.020
Good Luck!