Nice shots Rosie!!!!. I especially like the B&W one
If you get a chance to take some more piccies, bump the exposure time upto 60-80secs and see what you get. Should bring out the comet more. Alternatively, you could raise the time to 50 secs and then stack 5-10 of the pics in RAW, then process them.
Oh...you've also got a meteor and a satellite trail in some of your piccies