If you have the time and are thinking about doing Migration & Empire for your Extended Essay, then why not listen to this talk by Tom Devine. Here's the link to the talk in case the video doesn't look right on your screen.
Here's the powerpoint on the 1848 Revolutions I used this morning for those who didn't take notes and for those who want just want to supplement naotes taken already. Remember, this just adds to mix of reasons why there was a growth in national feeling but also why there were setbacks too.