FLR-M Bank Statments

Wife booked for FLR-M premium appointment tomorrow, we have a joint bank account that my wages are paid into that has online statements. I requested 12 months worth of these statements to be posted to me as evidence of us having a joint account and also confirmation of my salary. I have received the statements however they are not the usual postal statements, they are just black and white laser printed statements but they do come with a letter on headed explaining why they don't look like regular statements.

My question is will they accept these as they are or do I need to try and get to the branch in the morning and try to get them stamped? Although last time I asked them to do this they told me they didn't do this anymore.

Thanks Steve