''On Air, On Sale''

Coldplay and Kaiser Chiefs release records today, at the same time as they get their first radio play.

The system, known as "On Air, On Sale", was introduced by two of the major record labels - Universal and Sony - in February.

The system has benefitted some artists - R&B singer Jessie J saw her first two singles jump straight into the top 10.

But, with sales spread over a longer period of time, it has also led to a few anomalies. Acts like Arctic Monkeys, Beyonce and even Lady Gaga have seen singles peak much lower than expected.

It's led to a schism in the music industry. Some artists have called for an end to On Air, On Sale, while others argue that the system needs time to settle in... and for all the major labels to sign up to it.