Mick - I would guess they put the horizontal stabiliser there so that it is unaffected by downwash in the hover - something that produces noticeable 'tuckunder' during the transition in some other types with the stabiliser further forward.
The tail boom looks quite short so the positioning of the stabiliser also gives maximum 'leverage' as it is as far from the C of G as possible - therefore it can be smaller.
Turbomeca engines and a fenestron would suggest collaboration with Eurocopter/Airbus.