“The issuing Member State shall deduct all periods of detention arising from the execution of a European arrest warrant from the total period of detention to be served in the issuing Member State as a result of a custodial sentence or detention order being passed.”
“…the decisions of the judicial authority of a Member State making a request should be accorded a proper degree of mutual confidence and respect. Part I of the 2003 Act gave effect to the European Framework Decision of13 June 2002 ; it replaced the system of requests for extradition by Governments (of which the judicial review before the court in respect of the Polish national is a surviving illustration). The arrangements under Part I of the 2003 Act operate between judicial authorities without any intervention of governments. In applying the principles to requests by judicial authorities within the European Union, it is essential therefore to bear in mind that the procedures under Part I (reflecting the Framework Decision) are based on principles of mutual confidence and respect between the judicial authorities of the Member States of the European Union. As the UK has been subject to the jurisdiction of the CJEU since1 December 2014 , it is important for the courts of England and Wales to have regard to the jurisprudence of that court on the Framework Decision and the importance of mutual confidence and respect”