I checked your site and can download this pdf: /wpress/wp-content/uploads/2011/07/Lord-Patel-Report_ACC.pdf
But am seeing a 403 error when trying to download these 2 pdf’s.
/wpress/wp-content/uploads/2013/12/Engagaing-and-changing.pdf
/wpress/wp-content/uploads/2013/12/Drug-use-amongst-BME-communities-in-the-EU-and-Norway-2004.pdf
BPS Pro UAEG does not block pdf’s and since one of the pdf’s will open from your /uploads folder, but not the other 2 then UAEG is not causing this problem. The pdf’s appear to be part of some kind of WooCommerce download feature. Have you checked the WooCommerce download feature to see if there is something else that needs to be done? Like allowing downloading of the file?
Check your BPS Pro Security Log and post the log entries related to these 2 pdf files. The log entry may provide a clue as to where the problem is occurring.