Literature Research

https://www.tes.com/article.aspx?storyCode=6167026

http://www.bbc.co.uk/schools/parents/teaching_assistant/

http://www.skill.org.uk/page.aspx?c=359&p=485

There was an overwhelming answer to my question in these articles...

There are no formal qualifications required to become a Teaching Assistant, however it changes from school to school, from application to application as to what they chose for the necessary requirements.

This isn't particularly helpful when trying to find out how qualified you need to be for the job!

It seems I will need to contact various professionals and schools to find out what they consider to be the perfect teaching assistant.