My goodness, that's a gorgeous tandem, P1piper!
As a tandem owner (unfortunately not a Thorn, I bought mine before Thorn existed), I'm partial to the Big Bikes. Twice the fun and more, as you can figure companionship into the mix, shared Adventure, and reaching the top of every hill together.
All best wishes for many happy journeys to pass beneath your wheels. Goin' back for another look at this beauty...
Best,
Dan.