80s hits (British) that can be sung unaccompanied?

I have foolishly set myself a challenge in my local folk club, that next time I will sing 80s hits. As I don’t actually play an instrument, and I won’t have time to rehearse with any of the other musicians, I need songs that will sound good when sung unaccompanied, with no backing track/guitar or anything else. I can sing anything from tenor up to mezzo-soprano, male or female. Ideally the songs should be recognised by a British audience. I need ideas for 3 or 4 songs that I can perform in 2 weeks time.

…go!