After all of the drama with Netrunner destroying GRUB I made a second attempt after making the fresh Ubuntu install to fix GRUB..
I installed Netrunner.. the live version I have doesn't give any option to install without including its bootloader.. I then installed another fresh Ubuntu just so I had GRUB..
This time I had a GRUB screen with all of my distro's and all worked except Netrunner.. I was hoping that a different distro's bootloader would solve my problem but NO..
All of my other distro's (Fedora, Mint, Ubuntu & KaOS) booted up with no problems.. Netrunner still was being a b*tch.. Today, in the end, I installed Netrunner 14 Frontier and it installed with it's bootloader and all and no problems..
Perhaps there's something wrong with the Rolling-2014.09.1 version I have..
Thanks for the reply and suggestion malekmustaq, when I have the time I'll give it a go.. There is a noticable difference with Netrunner Rolling and 14 Frontier so I'd still like to get Rolling up and running.
From what I've read, Frontier 14 is Ubuntu based and Rolling is Arch based.. 'Don't quote me, I may be incorrect..', I do try and solve these problems myself before asking for help