It would be impossible to scrap a pdf page anyways? it's not HTML.. its like lets say a exe file you try to open that in internet explorer you'll get a bunch of symbols.

if you open a pdf page in internet explorer with view-source:http://to.com/file.pdf what do you get?

Thats the answer too.. just use

Code:
view-source:http://www.bapio.co.uk/uploads/publications/1342172154.pdf
if the file extension is PDF instead of html/php etc...

Here is what your scrapper will see, it's not HTML code
Code:
%PDF-1.2 
%âãÏÓ
 
9 0 obj
<<
/Length 10 0 R
/Filter /FlateDecode 
>>
stream
H‰ÍÑJÃ0†Ÿ ïð{§²fç$M“ínÒ-‚[&jeŠâÛÛ¤ñ~‚$ÉÉÿ}ÉÉ…¬Ij«¬ÌsÀ—‚Ç~€XÖ-],÷‚$Y—÷Ó)ü'N«u*1!œ„ÀVÙ?ŸÁ?
žb1RbbœÒ‰ÉH²[¹™TD:#ž&Ø*ÙÌX®¦øiç»$qnf¬ƒ¿†¶]»ÀõËîãaÿ¶{ÿÂØ£‰›×q|JªLs]™QÒI¸¬jî„%¯Œ9Øé`ß঺¼ÅU»itezÛ$›’Ú¿OeBÆÄ’Ò¯á¸Råþ@zÜ—úóÿgª¼ø<õ¡ª
endstream
endobj
10 0 obj
246
endobj
4 0 obj
<<
/Type /Page
/Parent 5 0 R
/Resources <<
/Font <<
/F0 6 0 R 
/F1 7 0 R 
>>
/ProcSet 2 0 R
>>
/Contents 9 0 R