Midway through the half, United Kingdom tacked on a 7-0 run to make the lead 27-12.
The No. 2-seed Vols (25-7) will play No. 4-seed Kentucky (23-10) for the SEC Tournament championship Sunday at 1 p.m. ET.
Shai Gilgeous-Alexander, a one-time Florida commit, scored 29 points to lead the Wildcats but it wasn't easy.
Gilgeous-Alexander led United Kingdom with 14 points in the first half, fourth time in last five games he was in double figures by halftime. The Vols beat Kentucky three times in the 1979 season, and the third time was to win the SEC Tournament.
The result earned the Wildcats the conference's automatic NCAA Tournament bid. He had two points but it came on a monster putback follow dunk when he just parted the Tennessee defense. To begin the second half, UT was 1-of-8 from the floor. Quade Green added 8 assists of his own in the winning effort for the Wildcats.
"I thought they were fresher, I thought they were crisper than we were", Arkansas Coach Mike Anderson said. It was really good for us as a team. But Wenyen was unbelievable today. You do that against Arkansas, they're going to ring you up really pretty quickly. I seriously doubt any of them would know who Reggie Johnson, Gary Carter or Dale Ellis was.
Tennessee shared the SEC's regular-season title with No. 16 Auburn, doing so after being picked to finish next to last in the league during the preseason.
Down two points, Xavian Stapleton missed a 3-point shot in the closing seconds as the Bulldogs fell 62-59 to the co-regular season champion Volunteers at the Scottrade Center.
The Big Blue Invitational sent a message to college basketball that the rumors of Kentucky's demise were exaggerated.
Sunday will mark Tennessee's first appearance in the SEC Tournament title game for the first time since Bruce Pearl's team made it in 2009. They said the medical staff were concerned about the back of Weatherspoon's head and his neck, but that he was blinking, responding, shaking and squeezing someone's hand. "I've been watching them". "His teams always get better late in the year".
Tennessee will be look for that type of offensive continuity on Sunday afternoon vs. the Wildcats who they have already beaten twice this season. "So I think tomorrow will be that kind of game".
But of course, Cal got them to peak at the right time for the fourth year in a row and now BBN is rolling into the tournament looking strong.
Barnes was pleased with Bone's production as he noted that his progress had been consistent after missing around ten games last season.
"We came out the first half and arguably played the best basketball we've played all year", Vols Coach Rick Barnes said. Me, I was ready to jump off a bridge. "You've got to unpack your bags, and let's get this together as a team and figure this stuff out". They needed that. They needed to be told you're not good enough, and you're not going to do this by yourself.