Research by Mastercard has revealed that London is the world’s top travel destination for the fifth consecutive year. It estimates that there’ll be almost 19 million visitors to London in 2015. Second place is Bangkok with 18 million. Nearly 1 million visitors to London will come from New York, followed by Amsterdam, Dublin, Frankfurt and Stockholm. Here’s the top ten most popular destinations in the world this year:   London Bangkok Paris Dubai Istanbul New York Singapore Kuala LumpurSeoul Hong…