Never ever ever doing that again!
Eventually made it back. Totally freezing and soaked, bike has a huge build up of salt over the engine and headers where the road crud hit the warm engine and stuck! Washed it all off as soon as I got home and then put some muck-off on before washing it off again - I'll give it a thorough clean in the morning.
The highlights were:
1. So cold (with the wind chill) that I had to stop every 50 or 60 miles so my limbs didn't bind!!
2. Bum ache so bad that I probably couldn't have ridden much more than 50 or 60 miles before stopping anyway!!!
3. Freezing fog came very close making visibility zero at times.
4. Icy / sleety conditions that put me into a slapper as I traversed the white line markings going from middle to inside lane on an open sweeping bend - was a lot more careful after that!
Thank god for:
1. The wiper blade on my new BMW Atlantis 2 gloves that kept my visor mostly clean - they sure didn't keep my hands warm though.
On the positive side, it's a lesson learned - I'll never do anything so silly again! And I am so appreciating my nice warm house