British travellers to Caribbean’s largest island warned: ‘Carefully consider if your presence is essential’ 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 Cuba , once the Caribbean destination of choice for millions of holidaymakers from the UK and elsewhere, is now on