The rumoured cancellation of King Charles’s trip to New Zealand as part of a Commonwealth tour later this year has left the King with “great regret”, a source has said. Charles is still expected to travel halfway round the globe to visit Australia and Samoa for a Commonwealth summit in October, but additional legs of the trip to fellow South Pacific states New Zealand and Fiji had reportedly been canned as the 75-year-old monarch continues his treatment for the illness. A source had told the Mirror that missing out on the added two destinations would represent a “bitter disappointment on both …