Where did you first come across London Grammar? Perhaps on the radio, though of course you could also have found it on Spotify, or via a shared link on Facebook. Where did you first get an earful of German Whip? It might have been on DAB, but equally it may have been Tumblr, or via Playlister, or on YouTube. However, ask anyone who can remember Britpop where they first heard the anthems of that era, and the answer is usually a great deal simpler: Radio 1.