This is on the Dollis Valley Greenwalk trail that runs from High Barnet to Hampstead and beyond, there is a further trail North that takes you to a very pretty Nature Reserve.
There is good parking in the area and well connected Tube (Northern Line) and Bus routes.
to find the actual coordinates to the Cache you need to follow the instruction below
N51 37.XYZ W000 11.ABC
LOCAL STREET SIGN
Add the two numbers of the local postcode together, this would give you the answer to'A'
SIGN POST NORTH
Take the capital letter of the last word of the walk. (for example if the word is Finchley you would be considering 'F' and the position in the alphabet would be F=6). this would give you the answer to'B'
WOODEN TELEGRAPH POLE
There is a metal plaque with 3 numbers add these up and subtract Seven. This would give you the answer to'C.
LAMP POST
Simply take the number and subtract 7 this will give you the number for 'Y'
Freezing point of water in centigrade this will give X and Z