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The Stig breaks into Lotus F1 HQ

As Top Gear's mysterious test driver, The Stig has driven just about everything on wheels - and more than a few things without. But an F1 car? That still remains a rarity, even on Top Gear.
That all changes in this latest promo clip, though. The video shows what happened when his Royal Stigness arrived at the headquarters of the Lotus F1 team in Enstone, England, where he somehow managed to scan his way in past security and got his hands on a Lotus-Renault E21, the V8-powered single-seater that Kimi Raikkonen and Romain Grosjean drove in the 2013 Formula One World Championship - and which the Stig will apparently be driving on stage during the upcoming Top Gear Festival in Durban. If you're not heading to South Africa this month, though (or even if you are), you can check out the footage in the video below.

This is how ground effects work in a nutshell

There are two ways to generate downforce. One is with all manner of wings and spoilers on the surface of the vehicle. The other is with ground effects. One you can clearly see, the other remains something of a hidden mystery. Fortunately, the good folks at Lotus and Goodwood are here to dumb it down for us non-engineer types. It's called Bernoulli's Principle, named after Swiss physicist Daniel Bernoulli who literally wrote the book on the subject way back in the 1700s. Countless engineers have spent their careers focused on its study and application, but the crux of the matter is that, as the speed of air (or other "fluid") increases, pressure decreases. Play with the air's increasing speed and decreasing pressure just right and you can generate downforce underneath the body of a car without significantly increasing drag as you would with surface spoilers. For evidence of how Bernoulli's Principle applies in practical terms, just look at the last Ferrari to pack a turbocharged V8 in the middle and the latest one. The F40 had a giant wing on the back, where the 488 GTB has none. But because the 488 uses underbody aerodynamics (or "ground effects"), it generates significantly more downforce than the winged F40 ever could, and at lower speeds. Ferrari, however, was not the first outfit to harness the power of ground effects. Lotus did with the legendary 79 that Mario Andretti drove to the world championship back in 1978. That was the genius of Colin Chapman, and to explain how it all works in layman's terms, our friends over at Goodwood Road & Racing brought in Colin's son Clive Chapman, head of Classic Team Lotus, to put together the video above. Related Video:

The UK votes for Brexit and it will impact automakers

It's the first morning after the United Kingdom voted for what's become known as Brexit – that is, to leave the European Union and its tariff-free internal market. Now begins a two-year process in which the UK will have to negotiate with the rest of the EU trading bloc, which is its largest export market, about many things. One of them may be tariffs, and that could severely impact any automaker that builds cars in the UK. This doesn't just mean companies that you think of as British, like Mini and Jaguar. Both of those automakers are owned by foreign companies, incidentally. Mini and Rolls-Royce are owned by BMW, Jaguar and Land Rover by Tata Motors of India, and Bentley by the VW Group. Many other automakers produce cars in the UK for sale within that country and also export to the EU. Tariffs could damage the profits of each of these companies, and perhaps cause them to shift manufacturing out of the UK, significantly damaging the country's resurgent manufacturing industry. Autonews Europe dug up some interesting numbers on that last point. Nissan, the country's second-largest auto producer, builds 475k or so cars in the UK but the vast majority are sent abroad. Toyota built 190k cars last year in Britain, of which 75 percent went to the EU and just 10 percent were sold in the country. Investors are skittish at the news. The value of the pound sterling has plummeted by 8 percent as of this writing, at one point yesterday reaching levels not seen since 1985. Shares at Tata Motors, which counts Jaguar and Land Rover as bright jewels in its portfolio, were off by nearly 12 percent according to Autonews Europe. So what happens next? No one's terribly sure, although the feeling seems to be that the jilted EU will impost tariffs of up to 10 percent on UK exports. It's likely that the UK will reciprocate, and thus it'll be more expensive to buy a European-made car in the UK. Both situations will likely negatively affect the country, as both production of new cars and sales to UK consumers will both fall. Evercore Automotive Research figures the combined damage will be roughly $9b in lost profits to automakers, and an as-of-yet unquantified impact on auto production jobs. Perhaps the EU's leaders in Brussels will be in a better mood in two years, and the process won't devolve into a trade war. In the immediate wake of the Brexit vote, though, the mood is grim, the EU leadership is angry, and investors are spooked.