Find X: Here it is! (Ruddy Depot) Mystery Cache

The cache is NOT at the given location.
You will need to solve the puzzle to find the container.
This cache forms one of the Ruddington Puzzle Cross as listed below, designed by Dr RuddRobins, tested & difficulty rated by Mrs. RuddRobins and swagged up + placed mainly by the young RuddRobins.

This isn't the puzzle, just a thing I laugh at:

This isn't the puzzle, just some background:

Ruddington Ordnance & Supply Depot was a Royal Ordnance Factory filling and storage facility, commissioned in 1940 and built during World War II by the United Kingdom Ministry of Defence (MoD). It was located to the south of Ruddington, Nottinghamshire, and took 18 months to build. In operation it consisted of over 200 buildings employing 4,000 workers at peak. It was decommissioned in 1945, became a storage area for ex-military vehicles which were then auctioned-off onsite, and was closed in 1985. Today the site is located in the Rushcliffe Country Park.

As World War II erupted, the MoD surveyed and purchased land for the construction of a national Royal Ordnance Factory, capable of the supplying the armed forces with sufficient armaments to win the war. Sites were chosen that were (for safety reasons) remote from dense populations, but easily accessible via mainline railways from a number of towns and cities to allow the large number of workers access. This latter provision also sought a location close to key railway junctions, allowing easy access inwards for raw materials as well as quick distribution of the final product to the key seaports.

Prior to 1940 the site was used as agricultural land, located on the Great Central Railway between the major East Midlands cities of Nottingham and Leicester. The proposed ROF at Ruddington was to be used as a filling factory for ammunition, employing up to 6,000 people. After purchase of the land in summer 1940, in December 1940 ground works contractors levelled off the land. At peak, the site employed 100,000 labourers during the construction phase. As well as over 200 buildings, for railway goods traffic access a branch line was built to Ruddington railway station.

After being decommissioned in 1945, the site was used by the MoD for auctioning-off redundant ex-military vehicles and equipment. Held every eight weeks, the auctions were publicly advertised in both local and national press. The site was finally closed in 1983 when operations moved to Bicester.

From 1985, the site was proposed for redevelopment. It had been scheduled for housing, after objections from the county council, the site was redeveloped into three sections:
North: the residual railway infrastructure and sidings were redeveloped at the Nottingham Transport Heritage Centre (now the Great Central Railway - Nottingham or GCRN)
East: redeveloped as a business park, the Ruddington Countryside Business Park (now just Ruddington Business Park)
South: the majority of the site was redeveloped at a cost of £3.5 million as a recreational area, known as Rushcliffe Country Park, which covers 210 acres (0.85 km2).

The Cache is not in the Ruddington Country Park, Ruddington Business Park or GCRN! There is a tenuous link to Ruddington Ordnance & Supply Depot which won't be apparent at the beginning. To find the cache, you need to solve 10 others in the RuddX series and hope nobody has run off with the clues . . . 

N 52 AB.CDE W 001 FG.HIJ

The caches in the series are:

10 of the caches as marked contain a clue to find the final Bonus Cache.