Subject Access form question

[The Squozen One 0]

I'm going to be filling in my Subject Access form today to obtain my criminal record information, and I need to supply two forms of ID. In my county's constabulary you can send clear photocopies of the ID, and I was thinking of sending my passport page and a bank statement. However, I'm a bit nervous posting something with my bank details on. Would it be acceptable to black out the actual account number and sort code and just leave the address info, or would that defeat the object?

Or would a birth certificate and passport be OK instead? I don't have a driving license or NHS information (that I'm aware of). It doesn't specifically say that a birth certificate is OK, but it would seem to fit the criteria:

'To help establish your identity copies of two different official documents, which between them show clearly your name and date of birth, must accompany your application. For example, a driving license, NHS medical card, marriage certificate and passport. Bank statement will be accepted with a valid copy of your passport. Clear photocopies are acceptable.'

It doesn't say that my documents have to contain proof of address (which I'm supplying elsewhere on the form anyway). Can anyone who's done this help?