[hellboy]

Thanks for your reply/link. Defo what it looks like, nice one.

I had the bike from new, and came fitted with a Thatcham 1 alarm. Maybe it was never connected for what ever reason, to be fair it was tucked away. Probably why I never noticed it before, until today looking to see if there was any wire breaks ( due to the bike not starting). I have replaced a couple batteries over the life of the bike and dont recall that connection. Why it stumped me.
I assume a proximity sensor would detect if your close to the bike and makes a noise etc. I dont ever recall it doing that if thats the case. Wonder where it was ment to be fitted.