Sector Operations Building and blast walls at the former RAF Kirton in Lindsey

Sector Operations Building, designed by J.H Binge of the Air Ministry to design 5000/37 in approximately 1940 to co-ordinate and control British and allies fighter interception with enemy aircraft.

MATERIALS: brick and reinforced concrete.

PLAN: a roughly square building.

EXTERIOR: the exterior elevations comprise brick laid in either English or Flemish bond, the brick beneath the height of the blast wall being red in colour with a buff brick used above. The roof is flat, and of thick reinforced concrete, possibly with a brick parapet. The principal entrances are to the east and west, via angled passages through the blast walls. Each elevation has Crittall windows with concrete lintels and cills. On the west elevation are copper telecommunications or electricity supply points.

INTERIOR: the principal space is the operations room located centrally to the building on a lower level accessed by two flights of three concrete steps, one of which retains its contemporary handrail. The plotting table would have been located, surrounded on two sides by a raised platform defined by a modern balustrade where plant, and ventilation rooms. The operations room does not retain any contemporary fixtures and fittings, with the exception of joinery; a modern bar counter and some wall art depicting a spitfire is later C20 in date. To the east is a suite of ancillary rooms which probably included a workshop, battery room and meterorological office. The internal layout remains, but most fixtures and fittings are modern with the exception of some doors, contemporary light fittings and joinery.

SUBSIDIARY FEATURE: concrete blast walls surround the building on all sides with angled openings on the east and west sides. The blast walls are protected by an outer earth bund.