By way of an update and thanks to MJ's wisdom, the brake fluid has been successfully changed, yay!
The oil leak turned out to be the cam cover in the end so that will be a job for the next cambelt change should the car make it to that as it will be looking for a new home soon and hopefully we can find it one. It's too good for me to nick the fog light grills for my S8 and scrap the rest!
I hope you are all staying well in what's turning into a rather strange time down here??
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2002 D2 S8 - Avus Silver, Valcona red leather, Dark Myrtle wood inserts, Heated rear seats, Heated windscreen, Auto dim rear view mirror, Bose, Xenon Plus, Servotronic, Extended leather, Heat & UV Reflective glass & Ski hatch. Gearbox went bang but she's sleeping safely away.