HMRC validation and evidence of costs incurred: HMRC will not charge for WRIT activities which cannot be separately quantified eg because they are part of a much broader query/activity.
Gwaith dilysu a thystiolaeth CThEF o ran y costau yr aed iddynt: Ni fydd CThEF yn codi tâl am weithgareddau sy’n ymwneud â CTIC na ellir eu mesur ar wahân, e.e.