They ask for everything - Edward's birth certificates, all my tax credit stuff AND my child benefit letters (he's over a year old!?), all my bank statements as they have managed to lose the Maternity Allowance letters so now the only way I can prove my income from last year is to send in bank statements with it all highlighted. They want copies of bills to prove we have the outgoings we have....(they want all this AT LEAST once a year, and this is hubby's 4th year as a student so it's a bit dull now lol).