The Assessment and Qualifications Alliance

AQA is the UK's leading awarding body for general qualifications.
www.aqa.org.uk

Edexcel

Edexcel is the leading provider of internationally recognised qualifications.
www.edexcel.org.uk

NCFE

NCFE - is a national, educational awarding organisation that designs, develops, and certifies diverse, recognised qualifications and awards, including for distance learning courses.

www.ncfe.org.uk

Eduqas

Part of WJEC, providing qualifications that inspire learners and enhance student achievement.

http://www.eduqas.co.uk/