Part of the Winterslow Welly Walk (a buggy friendly geocaching route).
You are looking for a small cylindrical geocache container.
The geocache is not in any of the adjacent fields. These typically have livestock in them.
This cache is part of the Winterslow Welly Walk which is a 4.5mile loop which can be started from a range of locations (the park is probably the best place to start/finish).