If anyone is interested and hasn't seen this site before, then it's really worth a look:-

http://spaceflight.nasa.gov/realdata/sightings/index.html

It's NASA's ISS, Space Shuttle sightings webpage. All you do is choose your country, then you have various regions/towns which you can choose from. This will show the times and whereabouts in the sky that the aforementioned ISS/Shuttle is visible.

Endeavour is currently docked with ISS.

Good luck spotting.