Regular readers of this blog will know how much I admire the work of the House of Commons Library. With a relatively small budget and staff - it regularly produces high quality research material to better inform the work of our MPs. Fortunately, much of this work is available free to their constituents too (and others! It's a great for students; academics; and anyone interested in a particular subject) through the internet.
The Library has to be politically neutral - it may report opinions - but its role is to inform not to advocate. Advocates though have access to the data and the arguments put forward from all sides.
It's worth bookmarking this page - http://researchbriefings.parliament.uk/ - it can be searched by subject, or can be used to find a particular paper.
I recommend the Key Issues book. This is now prepared for the start of each parliament and gives an overview of issues likely to come up in that Parliament. Can you afford NOT to read it?