Electrical Storm is now officially released for broadcast worldwide and already racing up airplay charts.

Even before the official release of the promotional single - pictured left - last week, stations from Mexico City to Melbourne were playing the unofficial version, after its surprise premiere on BBC Radio One (see our earlier story).

'There's been fantastic reaction to Electrical Storm,' said a spokesman at Universal Records. 'Radio programmers seem to love it as much as the fan-sites.'

Bono has also been talking about the single, which is not released in the shops until October 21st, to Neil McCormick in the UK's Daily Telegraph newspaper.

'It's about a couple in a room, feeling a storm brewing in the sky outside and equating that to the pressure they feel in their relationship. I think it captures a sense of unease I feel around the world, especially in America, an air of nervous anticipation. It's not an overtly political song, but I don't think we could have written it before what happened in New York.'

Electrical Storm, due for release on October 21st, will be available on two CDs and a DVD format. The tracklistings are:

* CD1 - Electrical Storm (William Orbit Mix) plus two remixes of New York, Nice Mix and Nasty Mix both by KLF's Jimmy Cauty.
* CD2 - Electrical Storm and a live medley of Bad, 40 and Where The Streets Have No Name recorded in Boston on the Elevation tour.
* DVD - Electrical Storm (William Orbit Mix) and video, exclusive sound bites from the band and a collection of photographs by Anton Corbijn.