Okay thanks for your replies guys. So after a night's sleep my heads is clearer. And yes I did dream about coolant that's normal okay! That's what happens when you go to sleep reading haynes manuals.
I've decided to delay the job a couple of days and sort out a hose today, I don't have one but it'll make flushing it easier and have wanted one for ages for cleaning it too. So that's job number one for today.
Job number two is I'm going to have a quick peak and see if I can glean any info on what's in there at present, colour etc.
Most likely I'll flush it as well as I can and then use the bike specific stuff. Job number three I'll nip up to CMC Clay Cross see what they have, if not then ebay.
But Coffee first.
Andy