Vorderman split from her boyfriend of five years just before Christmas in 2006. She moved out of the home that they shared in London and started a new life with her two children in Bristol.
However, the pair have now decided to give their relationship another chance and are hoping to stay together permanently.
A friend of the couple told the Daily Mail: "It's early days yet and they are taking things slowly, but the signs are very good."
"They have realised they could not live without each other," the source added. "Des has now bought a place in Bristol and he moves in next Thursday. The time apart appears to have been just what was needed for them both to be reminded of all the good points they had forgotten about one another when they were together for five years."