Please tell me the name of this song?

It's pretty recent - they keep playing it on our local radio station but I can never get the title or the artist.

I think it's a female singer in the main but there is someone else singing the lyrics "pack up your troubles in your kit bag" I think as a chorus or just backing ... words a bit like the old wartime song but in a modern style!

It's driving me and hubby mad ... Please help my sanity!