A THIRD of Brits want to switch to a plant-based diet next year, but 38 per cent think they'll fail within the first two weeks of January.A study of 2, 000 adults shows of those wanting to make a change, 53 per cent think it’s a healthier way of eating.... 1 Many of us want to try a plant-based diet-but fear we'll quit in just a fortnight Credit: Getty For43 per cent, the need to eat meat simply isn’t there, and 30 per cent just want to try something new. Saving the plant is the biggest incenti