Nathan Campbell married a stranger on Married at First Sight UK. Since filming wrapped, he’s focusing on a new venture: his fitness. The E4 star has now dropped 6lbs (3kg) and counting. Married at First Sight UK follows Nathan and Lacey’s blossoming marriage, after they tied the knot as total strangers. The E4 couple have gone from strength to strength, and he’s even more focused after. Nathan Campbell reveals weight lossNathan Campbell has revealed he’s lost 6lbs (3kg) since MAFS UK finished filming. He shared a shirtless mirror selfie on October 14, revealing he’s been “really focused on fit…