The Bring It All Back hitmakers have been dodging reports of a reconciliation recently, but on Wednesday (24Jun15), Spearritt and Cattermole were photographed locking lips while waiting for a train in the British capital.
Another snap shows the two sharing a smooch on the Tube again as they headed towards Stratford.
A witness tells the U.K.'s Mirror newspaper, "They looked completely loved up and couldn't take their hands off each other. It was obvious quite a few people on the tube knew who they were and were staring but they didn't care and kept kissing each other. Paul looked absolutely smitten and kept staring into Hannah's eyes."
Spearritt and Cattermole initially split in 2006 after five years of dating.
The news of their reported romance comes just months after Spearritt called off her engagement to personal trainer Adam Thomas in April (15).