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How do you become a European astronaut? #AstronautWeek 
Here are the key requirements
https://spacecentre.co.uk/blog-post/how-do-you-become-an-astronaut/
Here are the key requirements
https://spacecentre.co.uk/blog-post/how-do-you-become-an-astronaut/
@esa last recruited a class of astronauts in 2008, and the key requirements and statistics of that recruitment can tell us a lot about what it will take to be selected in the future. #AstronautWeek
Basic requirements:
National of an @esa member state 
Aged 27-37 years old
Between 153 to 190 cm
Fluent in English
Degree in science, engineering or medicine
3 years professional work experience in a related field
Physical fitness appropriate for age
In addition, the initial online application asked for preferred experiences including:
Pilot Language fluency in Russian, French, or German
Living and working abroad
Medical or emergency responder
Hands-on experimental research
Sport activities
The online application is just the start. 
In 2008, at the start of @esa's latest astronaut recruitment, 8,413 applications were successfully submitted, with 10% from Britain.
From this initial pool, only 900 applicants were invited to take additional tests.
@astro_timpeake describes many of the cognitive puzzles that his class were tested on in his book: The Astronaut Selection Test Book. https://www.waterstones.com/blog/the-astronaut-selection-test-book-pit-yourself-against-these-exclusive-sample-questions
Following the cognitive tests, and some additional questionnaires that explored the medical history and personality traits of the applicants, only 2% (190 applicants) of the initial pool were selected for further psychological testing.
After these tests, only 45 applicants were successful and passed on for further medical testing. After medical testing, only 22 were invited for final interviews with a panel of senior 
