The future of travel between Oxford and Cambridge lies in airships, according to World SkyCat Ltd.The SkyCat helium balloon would carry around 200 passengers, and travel at around 100 mph, making it ideal for the Oxford-to-Cambridge run. The journey would last around an hour, proving a speedy alternative to congested road-travel. What's more, the vehicle's design would mean that it could land nearly anywhere.Plans set the launch of the balloon for two years' time, although developer and author Michael Stewart, of World SkyCat Ltd., is still looking for investors to provide money to fund the venture.Emphasising the green nature of the project, he said: "The emissions are less than ten per cent per tonne per mile of an average aircraft."