After Saturday night's judges' scores were combined with viewer votes, Britton and her partner Artem Chigvintsev faced Girls Aloud star Kimberley Walsh and her partner Pasha Kovalev for a place in next week's Children In Need extravaganza at Wembley Arena.
Three of the four judges chose to save Walsh, whose position in the dance-off will have shocked many viewers, which meant Britton had performed her final dance on the BBC1 show.
Judge Bruno Tonioli said: "Well with all due respect, I thought one couple was outstanding and that couple is Kimberley and Pasha."
Judge Craig Revel Horwood described the choice between the two couples as a "no brainer".
Britton said: "This is the best party on the television, it's the best programme in the world, and I'm thrilled to have been part of it My ticket on the train has run out. Everyone else -- good luck, good luck, good luck! It's the best party. You've got dancing in the drawing room, you've got snogging upstairs, you've got throwing up in the garden. It's been fantastic. You really do live that -- the throwing up mostly!"
Speaking to her dancing partner, she said: "Artem, I've loved it. I wouldn't have swapped you for anything."