indicates the one-time extent of the site over what is now Thamesmead Further enlargement was to follow, and on an unprecedented scale; by the 20th century, though, there was little room for further development on site, so the Arsenal had to expand its area eastwards outside its brick boundary wall onto the Plumstead
Marshes. The eastern portion of the Arsenal site had long been used for the more dangerous manufacturing processes, as well as for proof testing. This pattern continued, with the Composition Establishment (where assembly of cartridges, fuzes and other items took place) being moved east of the canal and a
lyddite factory being established by the river. Later, much of the area of Plumstead and
Erith Marshes was scattered with storage magazines for
explosive materials, each in its own walled, moated and earth-traversed enclosure. Manufacture of
Whitehead torpedoes, begun in the Arsenal in 1871 (with the canal used as a testing run for a time) was moved to
Greenock in 1911. at the turn of the century Scientific research played an increasing role across the Arsenal from the early years of the 20th century: in 1902 an Experimental Establishment was set up to carry out research and investigations into explosives; (co-located with the Proof Butts, the two operations later combined to form the Proof and Experimental Establishment). At the same the staff of the War Department Chemist was expanded to strengthen its research capability; and over the next few years other small research departments emerged, focused on areas such as
metallurgy, materials and mechanical technology. The latter was renamed the Army Department Constabulary in 1964 and then merged into the
Ministry of Defence Police in 1971, with these two bodies continuing to police the site until its closure. In 1935, the Ballistics branch of the Research Department began work on developing rockets for use as
anti-aircraft weapons. To provide a more remote testing location,
Fort Halstead in Kent was acquired by the War Office in 1937, initially serving as an outstation of the Arsenal. This went on to become the Projectile Development Establishment (it later relocated to
Aberporth in Wales for the duration of the war). Explosive filling work ceased on the site, but the production of guns, shells, cartridge cases and bombs continued. The staff of the Chemical Inspectorate, working with explosives, were evacuated in early September 1940. Shortly afterwards one of the Frog Island buildings was destroyed by bombing and another damaged. The laboratories were partially re-occupied in 1945 and fully re-occupied by 1949.
The final run-down During the quiet period after the end of the Second World War, the Royal Arsenal built railway
wagons, between 1945 and 1949, and constructed
knitting frames for the
silk stockings industry, up to 1952. Armament production then increased during the
Korean War. From 1947, the British atomic weapons programme, called
HER or
High Explosive Research, was based at
Fort Halstead in Kent (ARDE), and also at Woolwich. The first British atomic device was tested in 1952;
Operation Hurricane. In 1951 the
AWRE moved to
RAF Aldermaston in Berkshire. ARDE, which had its origin in the Research and Design Departments of the Arsenal, retained its Woolwich outstation there until the 1980s. In 1953, a body called Royal Arsenal Estate was set up to dispose of areas of land deemed surplus to requirements. An approximately area of the site, around what is now
Griffin Manor Way, was used for an
industrial estate; the
Ford Motor Company becoming its first
tenant in 1955. Two of the roads on this estate
Nathan Way and
Kellner Road appear to have links with people connected with the Royal Arsenal: a Col. Nathan, at the Royal Gunpowder Factory; and, W. Kellner being the second War Office
Chemist. In 1957 a merger took place which created
ROF Woolwich: thus, for the first time, the various manufacturing operations on the site were united into a single
Royal Ordnance Factory. Its area of operation was henceforward restricted to the western part of the Arsenal site, with everything to the east being earmarked for eventual disposal. In this guise, the factory continued to operate (with upgraded facilities) for a further ten years. Parts of the older (western) section of the site were leased as storage or office space to assorted public bodies (including
HM Customs and Excise, the
British Museum Library, the
National Maritime Museum, the
Property Services Agency); alongside these tenants, a variety of smaller MOD departments were accommodated, some on a temporary but others on a longer-term basis. Shortly after the closure of the Woolwich Royal Ordnance Factories, the
Frog Island chemical laboratories were moved into a new building erected in 1971, in what was to become the
Royal Arsenal East. The old
Frog Island area was then sold off and a relocated Plumstead Bus Garage was built on part of this site. This action separated what remained of the Royal Arsenal, some , into two sites:
Royal Arsenal West, at Woolwich; and,
Royal Arsenal East, at Plumstead, approached via
Griffin Manor Way. It also led to breaking down of parts of the 1804 brick boundary wall. Part of it near Plumstead Bus station was replaced by iron railings and
chain link fencing; later the public roadway (now the
A206) was also changed at the Woolwich market area and the Royal Arsenal's boundary was moved inwards so that the
Beresford Gate (which had served as the main entrance to the Arsenal since 1829) became separated from the site by the A206. Its mid-1980s replacement, north of the rerouted A206, stands not far from where the original (1720s) main gateway once stood; it is graced by a pair of 18th-century gatepiers and urns saved from The Paragon on the
New Kent Road (itself demolished for road-widening in the 1960s). The Royal Arsenal site retained its links to ordnance production for almost another thirty years as a number of the Ministry of Defence Procurement Executive's
Quality Assurance Directorates had their headquarters offices located there. These included the Materials Quality Assurance Directorate (
MQAD), which looked after
materiel, including
explosives and
pyrotechnics; and the Quality Assurance Directorate (Ordnance) (
QAD (Ord)), which looked after ordnance for the Army. MQAD was the successor of the old
War Department Chemist and the
Chemical Inspectorate; QAD(Ord) was the successor of the Chief Inspector of Armaments department. There was a separate Naval Ordnance Inspection Department (based in Middlegate House from 1922) that looked after the
Royal Navy's interests.
QAD (Ord) was based at
Royal Arsenal West together with a Ministry of Defence
Publications section and part of the
British Library's secure storage accommodation.
MQAD was based, until closure of the site at
Royal Arsenal East; and all the buildings on this site were given
E numbers, such as
E135.
Belmarsh high-security prison was built on part of Royal Arsenal East, becoming operational in 1991. The Royal Arsenal ceased to be a military establishment in 1994. ==Present day==