Frankly, I would only regard that boat as a motorsailer. With a flat sail of (probably) no more than 30sqm on almost 3500kg displacement, she will be desperately slow in light winds. In headwinds and in a bit head sea her wide beam and shallow draft will not help. I also notice that the mast takes a visible bend even in what looks like very moderate winds.
As she is now, she will be a demonstrator of the British first-generation junks - slow, slow, slow.
The vessel itself looks to be stout and capable and may be persuaded to sail a good deal better, but then she would need a new, taller and stronger mast and a new cambered sail of at least 40sqm.
But, as said, as a motorsailer she may be fine.
Arne