Looking for a free lunch tomorrow? There is such a thing. If you can get to Martin Place on your lunch break, you'll be able to score a free burger. Deliveroo will be giving out over 2000 of them from midday on Thursday, April 4. They're not just any burgers, either. The burgs on offer will come from the delivery service's top-selling burger vendors, including Mary's, Ume Burger, Belles Hot Chicken, BL Burgers, KFC, Betty's Burgers, 8bit and Neil Perry's Burger Project. From the locally famed Mary's Burger and BL's classic cheeseburger to all things fried chicken from Belles, you'll be able to take your pick from a six-by-four-metre 'billboard' stacked with burgers. Vego options will be available as well. [caption id="attachment_642395" align="alignnone" width="1920"] BL Burgers by Kimberley Low.[/caption] The extensive giveaway is to celebrate Deliveroo selling five million burgers since launching in Australia three years ago. So, whether you're a CBD worker, a Deliveroo devotee or an average punter walking through the city streets, you should probably make a detour to Martin Place. It's first come, first self-served — so you'll want to get there sooner rather than later. The Deliveroo burger giveaway is happening on Wednesday, April 4 at Martin Place, Sydney from 12–6pm, or until sold out.