There is a rumor on the internet, or a misinterpretation of Philip Glenister's comments that Ashes to Ashes was approved for a second season/series and that he would be killed off.
Ashley Pharoah posted on TRA the following message:
Hi guys, Ashley here.
Just to explain the tabloid spin. What Philip was saying is he's "optioned" to do another series, it certainly hasn't been greenlit. And it's news to me that he's going to "bite the dust"!
I really hope you all get something from ASHES. It's a different series from LOM but we're very proud of it. Fingers crossed x
Thank you again, flip!
Edit: The Life of Wylie Blog also explains how the rumors got started and how much misinformation there has been in the tabloids.