The table below shows the visible passes of the ISS over Gosport in the next few days. These should be OK for south Hampshire and IOW too.
So, on 13 Aug, look to the horizon in the west at 21:31 (9:31 in the evening) and wait for a bright star like object to rise into the sky.
It will be directly overhead at 21:34! That’s the Space Station!
At the link here you can click on the date to get a skymap showing details on where to look!
I’m off outside now to wait for the pass tonight!