‘Don't book trips where you have to come home at a specific time,’ warns Energy agency chief Get Travel Insider with Simon Calder. A newsletter packed with tips, deals, inspiration, and the latest travel news Get the Travel Insider newsletter with Simon Calder Get the Travel Insider newsletter with Simon Calder Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice Sweden has warned of a potential jet fuel shortage stemming from