Wendy Quinn W1DY explains how to go about hearing and talking to the International Space Station (ISS).
The video shows the ISS frequencies used in most of the world, uplink 144.490 MHz, downlink 145.800 MHz, however, in IARU Region 1 (Europe/Africa) the uplink is 145.200 MHz. So just tune to 145.800 MHz and activate the standard -600 kHz repeater shift.
The current location of the ISS and the status of its amateur radio stations can be found at http://www.issfanclub.com/
Listening to the International Space Station http://www.uk.amsat.org/3491