The House of Commons has published a Committee report raising concerns about HMRC customer service levels.
https://publications.parliament.uk/pa/cm5803/cmselect/cmpubacc/686/summary.html
Related content from Claritax Books
In Taxpayer Safeguards – Rights and Protections for Individuals, written by the late Robin Williamson, the author has explored the whole spectrum of protections available to individual taxpayers.