[quote] Can I then download and play the taken king on my 360? Or will I have to spend another £40 on the same dlc in order to play it with my friends who don't have a one?[/quote]Bungie hasn't commented on whether or not TTK will benefit from the digital upgrade feature. So we don't know if buying it on one console will apply it to the other. That said, what we DO know is that the digital upgrade program was just that- an upgrade program, not a downgrade program. None of the offers have allowed you to go from the One to the 360. We have no reason to believe this will be any different, sorry.