Derek Brockway, visits Usk for a stunning 10-mile circular walk which starts and ends at Usk Castle. Along the way, he sees the landscape from above as he hitches a ride in a glider, learns about an ancient orchard, visits some community allotments and helps local youngsters plant sunflowers. Archaeologist Dr Erin Lloyd Jones finds out what the Romans did for Wales and Matthew Bassett explores decorative Oriental-inspired tinware once made in the town