Council Tax - Financial Write Ons

Currently waiting for a response from Wirral Metropolitan Borough Council, they should respond promptly and normally no later than (details).

Dear Wirral Metropolitan Borough Council,

Can you please provide the sum totals of Write Ons in the financial years 2015-2020.
I understand there are small credits in Council Tax accounts that cannot be refunded. Please Can you provide exactly how much has been 'written on'?

Also can you advise what the Council does with the credit amount?

Yours faithfully,

John Kline