Commenting on the switch, she added, "I'm sad to be leaving BBC Breakfast, it's been fantastic.
"But I'm so excited because as a presenter and a news journalist to be building a new profile from another great team is a really exciting opportunity for me. It is something I really couldn't turn down."
News of Susanna and Dominic's split first emerged in February when his profile appeared on a dating website. When asked whether they had separated, as indicated on his match.com post, Dominic replied, "I don't think it would be appropriate for me to discuss this."
It has been reported that Susanna's busy work schedule and Strictly Come Dancing rehearsals played a part in the seperation
There was speculation that Susanna's heavy workload — juggling training and filming for Strictly Come Dancing with her job as a BBC Breakfast presenter — had contributed to the decision.
Dominic admitted in December that Susanna's Strictly commitments had taken their toll. "Her schedule has been really full-on," he said.
"I'm looking forward to having my partner back. It's been tough but we knew it would be. We knew it would be an enormous commitment but we discussed it and I was so happy to back her to do it."