May I give one example of how this arises? There are some countries that require an interview with their consul in London to re-document someone who is here as an illegal immigrant and in detention. That requires an interview to which the person in detention has to agree. If there is a time limit of a month, he will know perfectly well that all that he has to do is to refuse the interview for a few weeks and he will be out.
Immigration Bill
Proceeding contribution from
Lord Green of Deddington
(Crossbench)
in the House of Lords on Monday, 1 February 2016.
It occurred during Committee of the Whole House (HL)
and
Debate on bills on Immigration Bill.
Type
Proceeding contribution
Reference
768 c1699 
Session
2015-16
Chamber / Committee
House of Lords chamber
Subjects
Librarians' tools
Timestamp
2016-03-09 17:08:54 +0000
URI
http://hansard.intranet.data.parliament.uk/Lords/2016-02-01/1602022000012
In Indexing
http://indexing.parliament.uk/Content/Edit/1?uri=http://hansard.intranet.data.parliament.uk/Lords/2016-02-01/1602022000012
In Solr
https://search.parliament.uk/claw/solr/?id=http://hansard.intranet.data.parliament.uk/Lords/2016-02-01/1602022000012