50 shares A source said: 'They were touching each other all the time. Stroking arms and flirting. I’d say it was heavy petting. He even had his arm around her at one point. 'They didn’t kiss but they were sat right out in the open and it wasn’t like they were hiding the fact they were together from what I could see. 'They didn’t seem to care who saw them. Then they left together.' Split: The singer, 27, revealed he had called off his engagement in June, 10 months after proposing to the model, 21, with a £3million ring (pictured on Tuesday)