A link following the Brexit vote, relevant to exchange rate changes:

https://www.bbc.co.uk/news/business-46883147

See below where to find the relevant section within the spec:

Edexcel spec reference 4.1.8 (d) Factors influencing floating exchange rates

AQA spec reference 4.2.6.4  How exchange rates are determined in freely floating exchange rate systems.

OCR spec reference P25  Evaluate the causes of exchange rate changes