DT4070 | DT: Brunei: double taxation agreement, Article 1: Taxes covered
From HM Revenue & Customs · Double Taxation Relief Manual
(1)
The taxes which are the subject of this Arrangement are
In the United Kingdom: The income tax (including surtax) and the profits tax (hereinafter referred to as `United Kingdom tax`).
In Brunei:
The income tax (hereinafter referred to as `Brunei tax`).
This Arrangement shall also apply to any other taxes of a substantially similar character imposed in the United Kingdom or Brunei after this Arrangement has come into force.