Question to the HM Treasury:
To ask Mr Chancellor of the Exchequer, how many letters to HM Revenue and Customs from members of the public remained unanswered after (a) four, (b) eight and (c) 12 weeks in the last 12 months for which figures are available.
HM Revenue and Customs (HMRC) does not hold this data. However, they regularly publish general performance reports at Gov.uk.