I have designed this new Political Parties unit for the new Edexcel Politics spec starting in 2017, although much of the content is also relevant to the new AQA specification.
Each of the lessons are incredibly thorough and include helpful hints and tips that the chief examiner gave during the exam prep training for the new specification. I am an examiner for the A-Level also.
I've spent a lot of time this summer putting this SOW together (I was frustrated at the lack of resources available for the new Politics spec!) and I will be using these lessons personally in an OFSTED OUTSTANDING context. They each include differentiated lesson objectives, key tasks, links to question AOs and practice questions for the new AS (although you can easily amend these for the whole 2 year A-Level)