United Kingdom of Great Britain and Northern Ireland
Part 2 Arrest and delivery of persons
Supplementary provisions
24 Delivery up of persons subject to criminal proceedings, &c
Schedule 2 makes provision for cases where the Secretary of State receives a request from the ICC for the arrest and surrender, or provisional arrest, of a person—
(b) against whom extradition proceedings are pending or in progress in the United Kingdom, or in respect of whom a warrant or order has been made in such proceedings,
EDIT.