Right.......I grew some balls and contacted the seller......he had added some type of rad leak (not additive which he told me) to the water...explaining it had developed a little leak, which was instantly sorted.
The bike was kept out side all weathers and said any signs around the plug were maybe from the ingress of water.
Anyway I've dropped the oil this morning and it looks just like any other oil....just black no creaminess at all which surprised me. Incidentally the filter hasn't got any paper attached.....I was given on of those like cup removal tools with the bike.
I just need to flush and refill the coolant and I'm hoping it happy days. I feel like I've made a bit of a fool of myself by expecting the worse.