Thanks for your question.
I know HMRC can request bank statement to corroborate in assessing income tax. There was a recent case on this allowing HMRC to do this. Maybe this is being applied to tax credits which are based on income.
I can look into this further and come back to you.
I am not advising that you do this but you could redact the statements and provide those if you feel particularly strongly about it. This means that you black out with marker the bits you do not want them to see. However this may arouse suspicion or request for further and more detailed disclosure. HMRC / Concentrix may not accept redacted statements. If you do not have anything to hide in the statements then send them in. Your failure to do so made adversely affect your benefit.
What they want to see is that your bills are addressed to you and cross refer to the statements to establish that you are paying them and not someone else.
Then when sending the statement redact the sort code and account number.
Send with a covering letter, explain the reason for the redaction and that you pay sn all inclusive rent. Do you have a copy of the tenancy agreement showing the amount of Rent you pay and confirming that it is all inclusive.
You can also redact the account numbers and say in the letter the reasons why. You can try but do be aware that they may not accept and could request clean copies.
Potentially they can.
They can claim you have not provided documents which they can ask for.
Not if you have not acted contrary to any conditions of tax credit.
Take a look at the attachment.