You can find all of the planning documents (of which there are a great many) at this page on the Cherwell District Council website: Bicester NW Plans and clicking on the text "view associated documents".
The full planning application can be found here: Full Planning Application
UPDATE: As of 22nd May Cherwell District Council has published its draft local plan for the whole of Cherwell, which you can read here. Be warned the plan document is a big PDF file - 222 pages amounting to over 20MB, so it might take you a while to download!