Bank statement, pay stubs, payslips are not mandatory documents as per CIC website info centre which is referred by the immigration officer while going thru the PA's file.
Try and analyze why they have asked employers reference letter and bank reference letter which does not mention the above stated docs. Coz employer and bank are the most authentic third party certified organisation as they will for one person will not fake docs and put their reputation at stake.
They don't even bother to see at pay stubs and payslips nor do they bother about statements as you see, the format of both the letters is too precise and too full of info required.
