A useful link relating to Government Intervention in Markets – http://www.bbc.co.uk/news/business-43427887 and where to find the relevant section within the AL Economics Specification:
Edexcel spec reference 1.4.1 Government intervention in markets
AQA spec reference 4.1.8.9 Government intervention in markets
OCR spec reference P 21 Explain the features of a ‘good’ tax
https://www.apt-initiatives.com/