Presumably the motor could be in the back, mounted as a sidewinder direct to the rear axle as no transmission is needed. And no trans tunnel required, so more cockpit space. All the underbonnet space would then be available for the battery.
Would make a very nice conversion for a 4/4...and given the low weight compared to other small electric cars it could have a reasonably good range.
In MOG magazine there is a layout for the Geneva show stand, and while (tantalizingly) the Plus E is listed on the diagram it is not in the text. Strange.