There's little I can say about this song that hasn't already been written a hundred times over already. But here goes anyway...
I was rather late with Another Girl, Another Planet by The Only Ones. I first heard it when working in Our Price in the early 90s. It appeared on the 'Sound of the Suburbs' compilation which we had been playing in-store quite a lot. One or two of my colleagues raved about it being one of the greatest songs ever written - a bold claim indeed - but it wasn't until I really sat down and listened to it properly that I actually 'got it'.
Its positioning on 'Sound of the Suburbs' was nothing short of genius. As Pete Shelley's sustained 'wiiiiiiiiiiiith' at the end of Ever Fallen In Love faded into silence, the muted, chugging guitar that opened Another Girl snuck in. A teasing bass pokes its head round the door to say hi, while a mischievous lead guitar fails to stifle a giggle as it prepares to unleash merry hell in the next 10 seconds. And those rumbling drums creeping in almost unnoticed... Has a more perfect intro ever existed? And it's not over. That soaring lead guitar, meandering its way ever upwards, while its roguish siblings, now including a cheeky organ, combine to form a surprisingly simple yet ridiculously effective backing track. On 50 seconds, the final piece of the jigsaw, Peter Perrett's whimsical, yet almost weary vocal.

It's a shame The Only Ones are remembered for only one song, and to many it's nothing more than "that song in the phone advert" (which sums up how far our society has fallen, if you ask me). If you're unfamiliar with any of their other works, I recommend Lovers of Today and Me and My Shadow. But don't go expecting another Another Girl. It is unique, it will never be bettered.
Yes - it is the greatest rock song ever written.
[1] Wikipedia: http://en.wikipedia.org/wiki/Another_Girl,_Another_Planet (accessed 15 Feb 2014)
[2] Arguably the greatest compilation sequence ever? 3. Ever Fallen in Love by Buzzcocks; 4. Another Girl by Only Ones; 5. Teenage Kicks by Undertones; and 6. Echo Beach by Martha & the Muffins. It surely doesn't get much better than that!