This section applies where as a result of matters reasonably beyond the control of the Secretary of State, such as—
adverse weather conditions,
technical faults or other issues causing delays to transport, or
disruption by the person to be removed or others,
a person is not removed from the United Kingdom on the date stated in a notice of departure details under section 10A ("the original notice").
The person may be removed from the United Kingdom if—
the Secretary of State or an immigration officer has given the person a notice of departure details (see subsection (3)), and
they are removed before the end of the period of 21 days beginning with the date stated in the original notice.
A notice of departure details under this section is a written notice which—
states the date on which the person is to be removed, and
states the destination to which the person is to be removed and any stops that are expected to be made on the way to that destination.
But this section does not apply if the notice under subsection (3) states, under subsection (3)(b)—
a destination which is different to the destination stated in the original notice, or
any stops that were not stated in the original notice, other than a stop in—
the United Kingdom, or
a country that is for the time being specified in Part 2 of Schedule 3 to the Asylum and Immigration (Treatment of Claimants, etc) Act 2004.
At any time before the person is removed, the Secretary of State or an immigration officer may replace a notice of departure details under this section.