The building was subject to assessment in 2000 (SUP 8). The northwest two thirds of the building was subject to a programme of historic building recording in 2011, prior to demolition; the south-east third had been demolished by the MOD prior to recording.<1><2>

One of the two examples of the Troop Stables recorded during the survey. It is a single-storey long rectangular structure, aligned NW to SE, of red brick laid in Flemish bond, with a small storage shed built onto the north-western end. The south-eastern end has been demolished, but map evidence suggests that a storage shed was also attached to this end of the building. The roof is pitched and covered with asbestos slates, and is fitted with a range of roof lights. Original features include a low red brick plinth, window and door heads of arched alternating red and yellow bricks, the use of York stone for sills and kerbs, and a drainage channel of Staffordshire blue bricks around the footprint of the building.<1>

The storage shed on the north-western end is centrally located and does not extend the full width of the stable block. It is flanked by original entrances, both of which have been reduced in height and width. The storage shed has an entrance with the original wooden door in its northeastern side and an original window high on the wall opposite. An entrance has been inserted from this shed into the main stable, but this is clearly later in origin. The north-east elevation of the main stable block has an alternating pattern of three windows followed by a large entrance of outward-opening double wooden doors with a concrete lintel above. This pattern is repeated and the length of the building, as shown on the O.S. map of 1875, suggests that the facade would have comprised three entrances and four sets of windows prior to the demolition of the southeastern end. The concrete lintels indicate that these wide entrances are not original. Ranged along the wall beneath the most north-westerly of the windows are five unevenly spaced iron tethering rings.

The south-east elevation follows the same pattern of windows and entrances but here the entrances are narrower. Door heads of the characteristic alternating red and yellow voussoirs indicate that these entrances are original. They have, however, been reduced in width and height with the original stable doors being replaced with modern fire doors. It is logical to assume that this is what the north-east elevation would have resembled before the insertion of the larger entrances. Only one tethering ring is found on this elevation but there is an iron tie for a hay bag protruding from the storage shed. It is possible that more of these original fittings have been lost over time, but the surviving locations of fittings confirm what is shown most clearly on the O.S. map of 1897. The two large rectangles projecting from the long sides of the building are litter sheds flanking the central entrances, and the smaller rectangle probably represents a water trough. Taking this into account, it is possible that the rings surveyed (and the equivalent ones lost at the demolished end) represent the total number of tethering rings that were originally attached to the building.

The interior of the building is a large empty space subdivided roughly into thirds by a stud wall to the north-western end and a concrete block wall to the south-eastern end. Both of these are full height to the ridgeline and the building has been demolished to the line of the concrete block wall. The
floor is of concrete. No evidence remains of original fixtures or fittings but it is possible to see the original brick archways which housed the sliding/swinging stable doors. The roof is of the same construction as MCC3121 to the south, with wooden trusses held in place with iron bolts and strapping. The internal arrangement would have been the same as that of the Officers’ Stables, only on a larger scale. This building would have had 56 stalls, 28 on either side of a central spine with a walkway around the outer walls.