(2) when and how his Department determined that it is normal procedure that preliminary regulatory impact assessments are not published.
Guidance on how and when regulatory impact assessments should be carried out is publicly available on the Cabinet Office website:
The decision not to publish preliminary regulatory impact assessments took full account of the criteria contained in the Cabinet Office guidance on when such assessments should be conducted, and when they are not required. To determine whether a change falls within the criteria or not, a preliminary assessment is undertaken. Where the preliminary assessment shows the impact falls outside the criteria, it is taken no further.