holidays have been cancelled at the last minute by tour operators as new destinations are swiftly removed from the travel corridor list.An announcement on Monday evening has left Brits in seven of the Greek islands just 36 hours to return home or face a mandatory 14 day isolation period.From 4am on Wednesday travellers arriving in England from Lesbos, Tinos, Serifos, Mykonos, Crete, Santorini or Zakynthos (also known as Zante) must self-isolate for 14 days.It comes as the government unveils a