K2 test stand, former Royal Ordnance Establishment, Westcott

The K2 test stand, located at the former Royal Ordnance Establishment in Westcott, is a Grade II* listed structure made of reinforced concrete. This tripartite test stand features a rectangular test bay to the south-west and two blast walls to the north-east. It is situated in the northern test area at Westcott, near the western end of the former runway and approximately 45 meters north of the K1 test stand.

The K2 test stand is designed for horizontal firing and includes a rectangular test bay with a flat roof that is open-ended to the north-east, facing the blast walls. The south elevation of the test bay is marked with a painted 'K2' in white on a black background. The roof consists of closely spaced metal rails that serve as roof trusses. The walls have metal-framed apertures for camera observation points, which are accessed through external doors leading to three high-speed camera bays within the structure. A raised camera bay at the south-western end is accessible via an external staircase.

Inside the test bay, there is a gantry for maneuvering the rocket motor under test, a sprinkler system, and fixing points on the floor. The main blast wall features a rectangular aperture or arch that allows the test plume to project towards the lower blast wall. This main wall has a battered and stepped profile and includes fixing bolts on its south-west face for steel plates intended to mitigate the impact of hot efflux gases, although these plates were never installed. The lower angled blast wall, while still monumental in form, is designed to trace an arc to capture any plume remnants, known as 'breakaways'.