DIPPRIV5500 | Goods and services for the use of entitled individuals: withdrawal of goods from a UK customs warehouse
From HM Revenue & Customs · Diplomatic Privileges Manual
Entitled individuals may make withdrawals from a UK customs warehouse using Form C426 (available from General Enquiries Helpline - 0300 200 3700) together with the normal warehouse documentation, subject to the following conditions:
normal customs warehouse removal documentation must be presented
copies 1 and 2 of a completed Form C426 must be presented to HMRC
for goods subject to FCO authorisation (such as motor vehicles, alcohol and tobacco products) only copy 1 of the Form C426 needs to be presented to remove the goods. The C426 must be authorised on the reverse by the FCO and have a release number in the bottom right hand corner. The FCO will retain one copy of C426. The goods should be entered to the customs regime using CPC 40 71 008
the goods must be consigned to the entitled person or the mission to which he belongs, and must not be for the personal use of other individuals
any prohibitions or restrictions have been complied with
the goods must not be for commercial use
after clearance, the C426 Form(s) must be retained with the customs entry