That's the one I was referring to.

This is the thing that makes me think there was something on the road, as I WAS riding like I was on ice. I always have when I've had new tyres and have never had any issue before. The roundabout in question can be taken easily at around 30mph, but I couldn't have been doing more than 10-15mph. Just one of those things that I will never get to the bottom off I guess.

when I was a (car) tyre fitter it was a common practice to shine up the sidewalls on old stock tyres to help sell them, a quick spray with some tyre cleaner and a wipe. now I remember a few years back that a mate did this on his bike when cleaning it only to drop it on the first bend cos the cleaner is extremely slippery. I'm wondering if this is the problem? also when fitting tyres it's common practice to use a tyre soap to ease it on the rim and help it pop out onto the beads, maybe this also contributes to the slipperyness? I'm no expert and only a novice biker however I recently replaced the tyres on my 650 and after hearing the stories I took it easy on the first few short rides but have had no issues and within 50 miles I've ridden as normal and find they definatly feel better than the old ones. I fitted mine myself using only fairy liquid to help them on which goes very sticky once it dries, they were washed down with a hose (just before the hose pipe ban lol ) after fitting to get rid of the fairy liquid.