Airline Norwegian has announced it will restart flights to and from UK airports from July 1 after an increase in customer demand.The carrier will initially operate flights on four routes - connecting Gatwick and Edinburgh with Oslo and Copenhagen.Since April, the Scandinavian airline has only operated domestic flights within Norway due to the collapse in passenger numbers caused by the coronavirus pandemic.The airline’s chief executive, Jacob Schram, said: “Feedback from our customers has shown that they are keen to get back in the air and resume their travels with Norwegian beyond the current domestic services that we have been operating.“Norwegian is returning to European skies with the reintroduction of more aircraft to serve our key.