The ONS publishes quarterly statistics on public sector employment including levels of employment in the public and private sectors. The latest release can be found at:
HM Treasury does not centrally manage changes to public sector work forces. It is for individual employers to decide what would be the most cost-effective work force to enable them to deliver public services and live within their spending review settlements.
Employers have been reforming their work forces since the spending review, to make the necessary savings and maximise value for money within their settlements. Different work forces have approached the task in different ways, for example, in the civil service a recruitment freeze has been in place since May last year.