Bugger! B*&&*%$s!! Battery flat on the GS! I went to start it and have a run around the block for the first time since before Christmas and it was that old machine-gun rattle from the starter! Clock back to 00:00!
So what to do? Feck battery too far under the tank to get the crocodile clips on the battery charger to attach, so next best? Try connecting to the starter motor input and an earth? Not tried that yet.
Next thing is to charge up the Kettle's battery in the house (no leccy in the garage) and then use that as an aid to jumping the bike. Fingers crossed!