Not sure 100% if this was the issue but it does seem to have solved it.
One of the sliding door windows was broken (would not go up or down no problem) however somehow it got nudged down by about 2mm down so not visibily down and not indicated as open on the vehicle panel. This was basically keeping the entire CAN bus (the electric sysem) on. By manually placing two hands either side and pushing it up to reengage and the CAN bus would switch off along with the ignition.
Lexicos got a reaction from bignev in Parasitic Power Drain On Battery