Mirrorlist here: https://download.qt.io/static/mirrorlist/

Assumptions:

• This happens, when the connection breaks, and it may happen any time within the flow.
• The user would need to be able to select suitable mirror based on geographical area: Continent as a primary vehicle. Secondary: country. 
• We need to display a list in which the user can make a decent choice for being able to continue in the process of installation

Demo of a POC