The government has said it will put more countries on its quarantine list if their infection rates rise.
Luxembourg and the Bahamas have higher proportions of COVID-19 cases than Spain and Portugal - but remain exempt from travel restrictions.
Popular travel destinations like France could also be at risk, despite lower infection rates.
SUBSCRIBE to our YouTube channel for more videos: http://www.youtube.com/skynews
Follow us on Twitter: https://twitter.com/skynews
Like us on Facebook: https://www.facebook.com/skynews
Follow us on Instagram: https://www.instagram.com/skynews
For more content go to http://news.sky.com and download our apps:
Sky News videos are now available in Spanish here/Los video de Sky News están disponibles en español aquí https://www.youtube.com/channel/UCzG5BnqHO8oNlrPDW9CYJog