To celebrate the 50th anniversary of its Big Mac burger, McDonald's has launched a limited edition range of products *and* a giant out-of-home ad in London.

The BFI IMAX in Waterloo has been transformed into a larger-than-life Big Mac, which we're betting will make thousands of commuters pretty hungry come dinnertime.

![enter image description here][1]

We love this ad as it proves that simple can often be the most effective way to communicate a message, and, alongside a couple of menu items to mark the occasion, it's a great marketing combo.

*Image source: WeRSM.com*

 [1]: /media/1939/wersm-mcdonalds-grand-big-mac-takeover-waterloo-london-leo-burnett-1-1024x768.jpg

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