My bad, 13.6 I think, it's difficult getting my drop tester to the battery, it seems I have to dismantle half the car to change the battery on this one! i'll try the jump lea to the engine if I can fond a metal part on the engine, everything is hidden on these cars. I had a similar problem on a previous voguse, an additional earth strap sorted it. anyway, I've got home start recovery coming over to see if it's a simple fix. I've got no reason to think it's a starter failure as such. I can't measure the voltage drop when starting because it won't start. Voltage drop after test was still in the green bit, I'll double check in a while.
The other problem, not so important, I had the heater valve replaced a few weeks ago, got the aircon re-gassed. Heating now works as it should, aircon takes quite a while to blow cold air into the car, just very hot air when it's been in the sun all day. Driving along, it takes about 3 miles to blow cold. Any ideas on that one?