They've kissed, mainly when they're in the background. And apparently Jack has alluded to the fact he's a member of DBS, maybe they're just very good at being discreet and play it down a little. Or maybe they're worried if they start snogging too much they may get carried away.
A lot of people passed comment on their reunion after Casa Amor and how they didn't snog, but having just watched last years, both Olivia and Chris and Gabby and Marcel greeted one another in the same way.
I don't think Jack is a Danny Dyer superfan , I think that's all been blown way out of proportion. He knows who he is and had a canvas from one of his films on his wall. It didn't even sound like Danny featured much in the pic, but maybe it's a full-on headshot, who knows?