Third, I had to understand how APPGs work during such sessions. Each oral evidence session lasts for about an hour (whether in person at the Palace of Westminster or via Zoom). During this time usually three experts are present, and their expertise can be based upon lived experience of the issue at hand, from providing services, or from academic research. The committee staff provide in advance a list of about 10-12 questions on topics that are likely to be raised, but committee members can and do diverge from this, and may raise topics that are hot in the media that day, or topics close to their own heart!