Here is a video showing how to set up the new HS2 Co-ordinate systems and how to convert GNSS & Total Station data to the HS2 grid systems

and link to download the HS2 Grid files

Setting up the New HS2 Co-ordinate systems in TBC video

HS2 Grid Files: Geodata_HS2.zip

Here is a Trimble Workflow Guide on how to enable and configure the new HS2 Survey Grid in Trimble Business Center, Trimble Access 2018 and later or Trimble Access 2017

Trimble HS2 Setup Guide