[@Jbcool][@Necroes]

“You heard me! Send their last known location to the Astartes and request that they assist us against these raiders. Request mind you, the Emperor's Angels do not like being ordered around by mere mortals.”

So, I'm sure by "Angels" JB means either Blood Angels or Dark Angels, which must be nearby. The Imperial vessel is clearly not hailing Vedius. 

And Vedius seems to have missed out on the battle on Terra.