John was watching the shadows holding the demon down and he said “looks like you have your own troubles, mate...” he then heard Chas and turned and ran for the cab, jumping into it. 

The demon heard the voice again saying “leave the girl alone...or you will deal with me...a spirit of shadows...” then the shadows slammed him into the ground hard. Then when the cab drove away the shadows slipped off and after the cab. 

John looked back at Kay and said “don’t worry, he won’t get you any time soon. We will get you somewhere safe and then figure out why they are after you. I’m John by the way...” the shadows moved around her hand out of sight, letting her know that they were back with her. John looked at Chas and said “our dear gurl here is a Phoenix...I’ve never met one. But it doesn’t explain the shadows coming to our aid...”