Ordinary,
You must read the pop up against the proof of funds field in the section where you have to upload all the supporting documents and take a call accordingly. As per my conversation with other who have submitted applications under EE (including myself), people have got financial profile made from their respective banks carrying information like balance in last 6 months, account opening date, account particulars etc along with complete contact information of the bank. It is purely your call if you want to submit least number of documents or be comprehensive so that the background check etc clears like a breeze.