Laura's death rocking the Square would lead me to believe that she dies in the Square. My money is on Lynne as she is leaving it. You already see the anomosity between them.
Lynne losing her baby would already be a mess. Then to find Laura knowing the baby wasn't his, split them up. She'd have to take it out on someone. I think it would be good for Eastenders to have a week where she reveals the truth.
The next episode she's not in it but we see a devestated Lynne and Gary talking about it. Ian hiding in his flat away from the Square. Then other scenes featuring other sub storylines.
Then towards the end of the episode it's dark. Pat is hammering at her door but no answer. The next scene we see the inside of her flat, the sounds of the train in the background, then the camera goes over her feet, her legs, her body and we see Laura lying dead on the floor.
Then the following episode we Laura again, still dead of course. And it fades back to her final week in Walford where we see her run ins with Ian, Garry, Lynne etc and the week leads right up to her murder where we see who actually killed her.