I've finally done it! Ran for twenty minutes solid and boy did it nearly finish me off! I got to about ten minutes in (I'm guessing I like to listen to my own music and I know the playlist pretty well now) and I hit the wall but I kept going much to my brain's dismay and managed to finish the run!
I have to say I'm feeling pretty good about myself and proud that I managed it and it's given me that extra boost to make it to the end. Time for the dreaded week six that I've been hearing about but after tonight's run I'm pretty sure I can get through it and finish the programme and become a C25K graduate in no time.