Question to the HM Treasury:
To ask Mr Chancellor of the Exchequer, how many calls to the HM Revenue and Customs self-assessment helpline were (a) abandoned by callers and (b) answered after a period of (i) 15, (ii) 30 and (iii) 45 minutes in the latest year for which data are available.
In December 2014, HMRC introduced a new telephony system and the data is not held in the format requested.
HMRC publish their performance data on a quarterly basis on Gov.UK.