IHTM04323 | Property of visiting forces: protection of residence and domicile
From HM Revenue & Customs · Inheritance Tax Manual
No period of duty spent by a qualifying person () in the UK is to be regarded as a period of residence here for Inheritance Tax purposes. And you should not treat such periods as creating a change of a qualifying person's residence () for those purposes, .
This means that a period of duty spent by a qualifying person will not count towards the long-term UK residence test ().
For periods before 6 April 2025, the legislation confirmed that a period of duty spent by a qualifying person did not create any change in the person’s residence or domicile.