There are short term and long term courses available in Air cabin crew field. Courses starts from 15-20 weeks to two years degree course. As an entry requirement You should be 18 years of age and 5.7" of height.
Specific entry requirements for this course can be found on the Course Search section of the UCAS website: http://www.ucas.com/search/index.html
. Some universities and colleges also provide 'Entry Profiles' which give applicants to higher education more detailed information on the courses they want to study, qualifications required, selection criteria etc. There are strict deadlines for application to UCAS courses.