Just seen that there's been a Grand Slam winner the year after the last three World Cups (Wales 2008, 2012, England 2016). Think England's continuity in selection and the coach will be a big plus. Hard to know what to expect from Wales and Ireland under new coaches. If England win their first two games, they have a great chance of a Grand Slam imo, especially with Wales and Ireland at home. It's a big if though.