I am not sure that these are the exact words of the convention, but article 14 of the Council of Europe convention on the prevention of terrorism requires us to take wide extraterritorial jurisdiction, including over the actions of our nationals, irrespective of the nationality of their victims.
Terrorism Bill
Proceeding contribution from
Paul Goggins
(Labour)
in the House of Commons on Thursday, 3 November 2005.
It occurred during Debate on bills
and
Committee of the Whole House (HC) on Terrorism Bill.
Type
Proceeding contribution
Reference
438 c1049 
Session
2005-06
Chamber / Committee
House of Commons chamber
Subjects
Librarians' tools
Timestamp
2024-04-21 22:44:23 +0100
URI
http://data.parliament.uk/pimsdata/hansard/CONTRIBUTION_275543
In Indexing
http://indexing.parliament.uk/Content/Edit/1?uri=http://data.parliament.uk/pimsdata/hansard/CONTRIBUTION_275543
In Solr
https://search.parliament.uk/claw/solr/?id=http://data.parliament.uk/pimsdata/hansard/CONTRIBUTION_275543