Police and Justice Bill

The Under-Secretary may know that I sit part-time as a district judge, so I know as well as many our duty to do justice. If a UK citizen is before a court because the Americans are trying to extradite him or her, is not it our fundamental duty to say to the Americans, ““You have to establish a prima facie case through evidence before we extradite””? Is not anything else a gross dereliction of duty to our UK citizens?