upbeat indie song

I heard only a fragment of this song. It was used on BBC tv in a promo for some music festival I believe. It was a guy singing and it sounded something like:

Oh wheo wheo oh oh oh wake up now
(and this was repeated at least once)

The wake up now may well have been something different because I really couldn't make it out and had no context to help me, but that is what it sounded like to me (but it could just as well be something like We don't know)

Any clues? Thanks in advance!

When reading this I instantly thought of the following song, but there's no "Wake up" in it
Metro Station - Wish we were older
They're not British ... but maybe you're still lucky and that's it.

Thanks for your suggestion, but that's not it. I think it is likely that it's a band that did also play at UK festivals last summer, but there are so many that I don't know which to try. And the bit of text I am really not sure about. It sounds as if it starts with the sound Way/We/Whey followed by a K sound, but it was such a short bit that I have no idea what they actually sing.