Numerous operators have recently begun offering the complimentary service Sign up to Simon Calder’s free travel email for expert advice and money-saving discounts Get Simon Calder’s Travel email Get Simon Calder’s Travel email Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice A European airline has announced it will offer free wifi in its cabins for the first time. Dutch flag carrier KLM is rolling out the complimentary