CH229500 | How to do a compliance check: information powers: rules that apply to all notices: copying or removing documents
From HM Revenue & Customs · Compliance Handbook
When a document is produced you can
take a copy of it
make an extract from it or
remove it and retain it for a reasonable period.
Your powers are the same as for documents inspected, see CH255530.
It is good practice to give a receipt whether or not you are asked to do so.