The Government Major Projects Portfolio (GMPP) is a constantly evolving group of the most complex and strategically significant projects and programmes across government. In 2017/18, the GMPP included 133 projects and programmes, across 16 Departments and agencies.
The Infrastructure and Projects Authority (IPA) publishes an Annual Report on the GMPP each year, alongside consolidated data and narratives, which include project end dates. Any changes to project end dates are reflected in subsequent annual reports.
See the IPA 2017/18 Annual Report here:
See the IPA 2016/17 Annual Report here: