As Rob mentioned, the old visitors entrance was less than optimal in relation to security. In addition, it was less than optimal for tours, parliamentary business and parliamentarians or accredited personnel. The new design, as proposed right now, will offer obviously increased security in terms of distance from the main building, but also a dedicated lane for parliamentary business or accredited personnel through the buildings and an increase for the tours.
On February 1st, 2022. See this statement in context.