# The Town and Country Planning (Northwood Headquarters) Special Development Order 2025, Paragraph 11


In Part 19 (development by the Crown or for national security purposes)—
(a) Class A (general development by the Crown)
(b) Class B (extension or alteration of an operational Crown building)
(c) Class C (developments on operational Crown land)
(d) Class D (hard surfaces for operational Crown buildings)
(e) Class G (development on operational land outside an airbase)
(f) Class K (use of land by the Crown in relation to surveys etc)
(g) Class Q (development by the Crown relating to an emergency)
(h) Class QA (development by the Crown relating to a pandemic)
(i) Class R (erection etc of gates, fences etc by the Crown for national security purposes)
(j) Class S (closed circuit television cameras for national security purposes)
(k) Class T (electronic communication apparatus etc for national security purposes)

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Source: https://www.legislation.gov.uk/uksi/2025/37/schedule/2/paragraph/11 (the official version)
Page: https://openlegislation.uk/town-and-country-planning-northwood-headquarters-special-development-order-2025/schedule-2/paragraph-11
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.