User error
went out with the battery switch on both, after months of sitting in the Marina with the odd short run at lunchtime.
Sat at anchor for 7 hours with too much gear left turned on and forgot to separate the batteries.
All 3 batteries have been checked and recharged.
Thanks again to everyone who were tryng to find out where we were so they could assist. or have sent good wishes
I am making some changes onboard so it will not happen again, but that is for another thread.