SAM11020 | Appeals, postponements and reviews: postponements: what SA items can be postponed?
From HM Revenue & Customs · Self Assessment Manual
Formal standover
An application for a formal standover may be accepted against a charge arising from the following
no legal right to formally postpone charges arising from
Penalties
Surcharge
Interest
Informal standover
All or part of any SA charge may be informally stoodover unless that part of the charge is already formally stoodover.
An informal standover should, however, not be used if it is possible to formally standover all or part of the charge.