After looking round t'internet for a while, it appears that Android doesn't allow this :sign0148:
Other apps that give the impression of no icon seem to use a transparent icon. This is all well and good but I'm not 100% convinced with this. What happens when you have 3 transparent icons up there then you get a text msg or something? then the status icon for the text app will be show half way across the bar with blank space in between. Wonder if there is a way to force the transparent items to the far right so this effect is eliminated.
Going to keep reading and tinkering and will come back to report should I found anything out.
Ta.