This is a simple but rather bitter pop song, although on the surface it sounds quite sweet. If I recall correctly, it was written about the singer that Twinkle was seeing at the time. The gentle arrangement features acoustic guitar and some brass. It's not hard to hear why Morrissey liked this song enough to cover it with The Smiths.
Twinkle has a lovely clear voice, and much as I respect Moz, this version towers above the one done by The Smiths, which suffers from a strange mix of production styles. That said, I have a strange mix of emotions on hearing the song, since I heard the Smiths version at 14, but only got into this one in the last few years.
from the single Golden Lights available on CD - Twinkle (RPM)