The cache is in a small transparent cylindrical container with a screw top lid, large enough for a few things but not many.To get to it, you will have to cross a small ditch coming off the main stream. You can find this in very top right corner of the park, where there is a wooden fence post. In Summer or late Spring, there will be loads of stinging nettles and thistles - bringing small children is not advisable, and thick outdoor clothing and gloves would make it a lot easier! When crossing the ditch, be careful of the barbed wire, but there is a small trail where there is no barbed wire very close to the post. Once you're across the ditch, there are some trees overgrown with ivy. The cache is located somewhere here.
Happy hunting!