Paragraph 1
(1)
Where a person has been sentenced to any form of custody by a service court, and is being removed from the United Kingdom to another country, he may in the circumstances specified in sub-paragraph (2) be detained for a period not exceeding seven days at such establishment in the United Kingdom as may be determined in accordance with the following provisions of this Schedule.
(2)
The circumstances referred to in sub-paragraph (1) are that—
(a)
a written request has been made by the service authorities of the country to which the person belongs, and
(b)
his temporary detention in the United Kingdom has been authorised by the Secretary of State.