The inquiry's first module looks at pandemic preparedness, as campaigners say lessons must be learned.
The one-day hearing had originally been scheduled last month but was delayed after the death of Queen Elizabeth II.It will be largely procedural, involving lawyers and an announcement about who will be giving evidence. Public hearings where witnesses are called will not start until the spring.But this first preliminary hearing is still being seen as an important milestone for the families who lost loved ones.
Ms Jackson, of the Covid-19 Bereaved Families for Justice campaign group, said it was essential lessons were learned. She was "really pleased" the inquiry was finally starting but it had taken too long to reach this stage."We lost so many people. If people have done things wrong, they need to be held accountable.
"For me, my family and the others who lost loved ones, it's important that answers are found to the questions that we have."Baroness Hallett previously presided over the inquests into the terror attacks in London on 7 July 2005 Chaired by former High Court judge Baroness Hallett, the inquiry is so wide ranging it has had to be split into separate sections - or modules, as they are being called.