Donald Trump may have said that he wouldn't get involved in the U.K. General Election while he's in London this week (although that's debatable). But another U.S. giant isn't afraid to get political as the U.K. heads for the polls next week: Burger King. 

A new outdoor campaign running on bus sides for the fast feeder by BBH states: "Another Whopper on the side of a bus. Must be an election."

It makes explicit reference to the 2016 Brexit referendum campaign, when the Boris Johnson-backed "Vote Leave" campaign famously ran bus posters claiming that leaving the EU would save 350 million pounds that could be spent on the NHS. The statistic has subsequently been proven to be untrue, although so far Johnson, now Prime Minister, has escaped being prosecuted for making the claim. 

The campaign, which is running on a bus passing through Westminster, is already making waves on Twitter, where it's been retweeted by the likes of political comedian Jonathan Pie. 

The idea for the stunt came from BBH creative team Stu Royall and Phil Holbrook. "This is how advertising is meant to work," said BBH Chief Creative Officer Ian Heartfield in a statement. "Phil & Stu came up with a killer idea, a brave client didn’t hesitate to approve it, we got it made and out onto the streets in next to no time, the nation started talking about it. Job done."