The co-ordinates above are not the co-ordinates of the main cache. In fact, if you'll struggle to get to that spot unless you're a duck !
To find the cache you need to find one of the new wooden information pillars and collect the information below:
A = The number of letters in the name of a Northern city seen on the throwing line holder
B = The number of times the Nene Park tree logo appears on a given pillar
C = The most common number in the ranger’s phone number (apart from zero)
D = The number of letters in the first word on yellow
E = The first number in the Y grid reference
F = The number of circular warning symbols
The final cache is at: N 52° 33.ABC W 0° 1D.0EF
(If you have collected the information near to the main road, please don't cross the golf course: Come round the lake and follow the path.)