Well, here's a little story about international trade. My late ex-father-in-law was an international businessman. Decades ago, he became a multi-millionaire from the commission he earned selling machinery for factories to China, when it was emerging from its Communist era. The machinery was manufactured in South Wales and exported. Unfortunately, the Chinese learned to make their own machinery, so the Welsh manufacturing plant was closed down. That's the present day reality. China knows how to make its own machinery and doesn't need to import - in fact, it's become so proficient, it even wants to build nuclear power stations. 
The UK makes most of its money from financial services. Almost 10% of its total exports are from exporting financial services to the US. The US likes London, because we speak English (or 'American' according to Sarah Palin) and it is a gateway to the EU and its far bigger market. This isn't reported much in the British press, although it is reported in the foreign media. London is currently the biggest financial centre in the world, but if the Americans have second thoughts and centres like Paris make a concerted effort to capture business, the British economy is in for a major blow.
The UK exports relatively few tangible goods. They include cars and pharmaceuticals. However, the biggest car manufacturers are foreign-owned and we know that Japanese companies have said that they are considering relocating their factories abroad. Pharmaceutical companies are in a constant game of buying smaller companies. The UK's advantage is that we have world class R&D centres in Cambridge, Oxford and London, but they rely on EU funding and have a high proportion of foreign researchers. Generic medicines (when a patent expires) are already manufactured in other countries, such as India. It wouldn't take much for pharmaceutical companies to leave the UK and relocate.
Liam Fox would do better to work on ways to keep financial services, cars and pharmaceuticals in the UK, rather than berating British businessmen for being lazy. If he's not careful, they might do the same as Dyson and relocate their manufacturing abroad.