CH228340 | How to do a compliance check: information powers: excise information notice: timing of requests for documents
From HM Revenue & Customs · Compliance Handbook
It is often necessary in excise compliance work to gather information quickly, however before issuing an information notice you should consider
The burden you may put on the recipient of the notice by asking for a great many documents all at once.
The inconvenience you may put the recipient to if you ask for documents on a piecemeal basis.