It’s thought there are more than 100,000 commercial flights a day, and that a massive £1 trillion is spent on business travel every year. Whether you are flying for business or pleasure, it can be a much better experience if you do some research beforehand.  Here are five business travel hacks for surviving a long flight. 1. Use airport lounge facilities Airport lounges are no longer just for people with a business class ticket or elite flyers. Even if you…