Clue 1: Kings Langley
N51 42.661 W000 26.933
Kings Langley is a historic village and civil parish in Hertfordshire, England. It was once the location of Kings Langley Palace, a royal palace of the Plantagenet kings of England.
What speed is the slow zone on Church lane. A = the first digit plus 1.
Clue 2: Chiswell Green
N51 43.722 W000 21.557
Chiswell Green is a small town which is located on the North Orbital Road, close to Junction 21A of the M25.
Park at the above coordinates and spot the nearby pub. B = the number of hammers.
Clue 3: London Colney
N51 43.460 W000 17.760
London Colney is the second largest village in the U.K.
What is the weight limit half a mile ahead. C = the first digit plus 2.
Clue 4: Potters Bar
N51 41.821 W000 11.460
Potters Bar is located on the Great North Road, one of two road routes from the City of London to the north of England. The road was originally numbered as the A1, and later the A1000.
Near the above coordinates you will find some speed humps. How long do they last? D = the last digit.
Clue 5: Cockfosters
N51 39.117 W000 08.949
Cockfosters station opened in 1933 and is the end of the Piccadilly underground line. Trent Country Park is situated nearby.
E = The speed limit at the above coordinates, plus 3.
The final cache is a small lock-n- lock located a few minutes drive from the final clue.
The cache can be found at N51 A8.CE9 W000 D9.B19 (NO trespass necessary)