A survey of 4,000 UK shoppers has declared Apple’s iPhone to be a more important invention than flushing toilets or space travel. The smartphone has also been voted more important than the combustion engine and washing machine. The study, conducted for Tesco Mobile, puts the iPhone in eighth place on a 100 item list (below). The wheel was voted the most important invention in history, ahead of the plane, lightbulb, the world wide web and computers. Lance Batchelor, Chief Executive Officer of Tesco Mobile, said: “It’s amazing to see how much the iPhone is valued, sitting alongside inventions…