The USA, Malta, Israel, Iceland, Gibraltar and Ireland are likely to be on the ‘green list’ for safe travel this summer, according to new modelling. The analysis, carried out by Robert Boyle – former strategy chief of British Airways and its owner IAG – confirms that, according to the Government's “risk” criteria, only eight destinations will make the cut when the green list is unveiled on May 10. New Zealand and Australia will also be categorised as green, the analysis shows, although both countries are currently closed to foreign arrivals outside of their ‘Tasman Bubble’, which opens today. Most of Europe – including holiday favourites Spain and Greece – is expected to fall on the “amber” list, while many more countries could be categorised as “red” by the summer based on the current modelling. So what does this mean for your summer holiday hopes? Here, Telegraph Travel’s team of experts mine their worldly knowledge to pick out seven once-in-a-lifetime holidays that will be possible this summer, without any quarantine on arrival or return. Since Australia and New Zealand are unlikely to welcome Britons this summer, we have focused our attention on the more viable green-list potentials of USA, Malta, Israel, Iceland, Gibraltar and Ireland. For a tropical island escape: Kauai, Hawaii Simon and Susan Veness Remote, rugged, impossibly picturesque – Kauai, the northern outlier of Hawaii’s archipelago, has stolen almost all its sister islands’ share of big, bold and dramatic. Take a small-boat cruise along the north-west coast to discover the looming Na Pali cliffs, the razor-like peaks towering almost 4,000ft high; soothe your soul in Hanalei Bay, where the gorgeous two-mile, crescent-shaped beach is backed by verdant mountains; marvel at Waimea Canyon, a breathtaking rift through the island’s core, 10 miles long and 3,000ft deep, fully justifying its nickname as the Grand Canyon of the Pacific.