If you dont have a degree or hnd you can do an apprenticeship which gives you the practical experience through a placement in a school, money in your pocket and also a qualification to go with it usually the supporting teaching and learning in schools qualification....i would look in to that I couldnt get on it because I already have a higher qualification but its in a different field to working with children.
The age limit used to be 16-24. But the government has changed this and there is no age limit anymore.
info
http://www.apprenticeships.org.uk/
vacancies
https://apprenticeshipvacancymatchin...1UiFoegg%3d%3d