The reports I have collected are related to mathematics education in the UK (but England specifically). Frequently they come to my attention via twitter or the newspapers (usually highly interrelated, so both).
All reports relate to mathematics education, and this includes STEM education, statistics education and financial education.
The list of reports is here.
The criteria for their choice are described in more detail here.
A quick analysis is here.
A number of these documents have been summarised by the Document Summary Service at the University of Bristol.