This cache is located at the point the 500km2 grid of ‘S’ meets the grid of ‘T’ on an Ordnance Survey map at TA 00000 31031 (500000 431031).
It is located on Westfield road just before Raywell, there’s a small parking space next to GZ.
Maps use the Ordnance Survey National Grid coordinate system; this is based around a large 2500km2 grid, containing 25 individual 500km2 grids each with their own letter starting with ‘A’ in the top left and ending with Z in the bottom right (The letter ‘I’ does not have a grid) the UK uses the letters of: S, T, N and H. The O square contains a tiny area of North Yorkshire, but almost all of it lies below mean high tide. Inside these smaller grids are 25 even smaller 100km2 grids each again containing their own letter, this is listed by placing the first grid letter next to the second grid letter, for example the S grid starts at SA in the top left and ends with SZ in the bottom right. Now inside these even smaller grids are more grids, these are the 1km2 boxes on a standard OS map there are 100 of these inside each small square, these are what give you 4 figure grid references, i.e. TA 00 31 the 4 figure grid reference of this cache, you can keep going to get things like 16 figure grid references, you just keep adding more grids and numbers (the coordinates of this cache are a 10 figure grid reference TA 00000 31031).
This diagram shows the paragraph above in illustration form.
Good luck on your search!