Luke Littler may have only been a professional for a couple of months but the teenage sensation has already seen fit to make a major change. The 17-year-old used different darts on night five of the Premier League on Thursday, a decision that has been backed by Wayne Mardle ahead of the UK Open this evening. Littler rose to prominence at the World Championship at Alexandra Palace at the turn of the year, making it all the way to the final aged just 16. He has since won the Bahrain Masters and a Players Championship tournament, hitting a nine-darter in both events. Littler has had a consistent,…