By Lucretia Munro Former Love Island star Hannah Elizabeth proudly showed off her post-surgery body as she unveiled her new bum with fans in a video posted on social media. Wearing a black thong, Hannah displayed her rounded derriere as she attempted to pull up a pair of trousers, which only proved how pert the surgery had made her bum. But this is not the first time Hannah, 33, has had work done to her bottom as she received filler injections last summer, which she shared with her social media followers. In the video, Hannah said: “So we’re just adding a bit of volume to the top today. She ad…