Morning Folks
Not a driver, and sadly they've yet to include the ISS on our radars at London but I'd like to point you in the direction of:
Heavens-Above Home Page
For when yu're sat in your garden in the summer you can plug in your precise location and it'll tell you precisely when the ISS will be coming into view, from where, in which direction and how bright it will appear. Once people are drunk at your BBQ and you've miraculously predicted the 'first coming' they'll all spend the rest of the evening laying back on your recliners staring skyward. OK I exaggerate but it's quite an interesting site for those of a mildly sad disposition!
You can also see the path being mapped by the ISS so maybe you could see where it's likely to be relative to your flightpath (or though be warned if I'm wrking you may be a few miles either side of your predicted trajectory!)
It'll also show the visible passes of hundreds of satellites and also the elusive Iridium flares. I've not caught sight of one yet, but at least I know where I can find out they should be....
Anyways, have a browse
CT