Developments in UK executive agencies: Re-examining the ‘disaggregation–reaggregation’ thesis

Executive agencies remain key players in UK government. However, reflecting their declining political profile, little research has emerged on the longer term evolution of this key new public management (NPM) infrastructure. Although widely cited, the ‘disaggregation–reaggregation’ thesis – which posits that a significant reversal has taken place, following the extensive agencification of the 1990s – has received little systematic evaluation. As political interest in the agency model reawakens under the Coalition Government, it is necessary to understand how the agency landscape has evolved while outside of the limelight. Accordingly, this article examines developments across 1988–2010 along two dimensions: ‘structural’, relating to organisational boundaries; and ‘functional’, relating to the department–agency task division. Viewed within this structural–functional framework, considerable merit is found in the disaggregation–reaggregation thesis, although not entirely in the terms in which it has come to be accepted. The limited extent of formal ‘de-agencification’, particularly, challenges existing reports of the expansion and decline of agencies, and raises important issues for the future research agenda.