Sontaran flagship

The Sontaran Flagship was a massive spacecraft that lead the Tenth Sontaran Battle Fleet into battle.

It was floating above Earth, where General Staal was spearheading the invasion. There was a teleport pod from the ship to Rattigan Academy.

The ship was destroyed by Luke Rattigan, when he activated his atmospheric convertor. (DW: The Sontaran Stratagem/ The Poison Sky)