The Multiculturalism vs. Integration Debate in Great Britain [good summary of concepts] 

https://www.hausarbeiten.de/document/59366

Videos: 

Has Multiculturalism Failed? [UK]  https://www.youtube.com/watch?v=klKpMBJ4J1o

Multiculturalism and National Identity  https://www.youtube.com/watch?v=O1hKcTtMz6o