I am an IDIOT!!!
After taking a better look in the daylight, I realised that I didn't check the Tail Lamp Relay, so I replaced that... Yep it was dead, although still had no brake lights, turns out that although I thought it was unlikely both bulbs were blown... $10 and 5 mins time and I have no more gremlins in the electrics *phew* and more $$ to actually spend on getting her a decent service and a bit of TLC