Im going ever so slightly mad

Right, started on this, realise I'm probably a few years behind but what a great show.

Except the music as the credits roll (after Tommy and Eileen have just done the deed on the worktop) in series 1 episode 6. What the hell is it? Great piano and soft lyrics but it's Listed on another site as an Aimee Mann track but it's not that one.

Any ideas??