Ministers are set to warn the British public that flight cancellations will hit summer holiday plans as new research suggested that the UK is more exposed to jet fuel shortages than other European countries. Heidi Alexander, the transport secretary, is set to tell Brits that there could be flight cancellations this year as she will talk up staycations, according to The Times. Her warnings will follow a prompt by Sir Keir Starmer that people would have to consider changing “where they go on holiday”. Trade experts have…