This document summarizes the work of Clariah workpackage 2. They build common infrastructure for virtual research environments including agreements on APIs, basic applications, and components. A researcher can launch their VRE, pull in authoritative data from various sources, add their own data, analyze the data through query languages or GUIs, and customize the VRE with additional tools and user management functionality. This infrastructure helps researchers create virtual research environments to curate and share data as a community.