Frontman Chris Martin is said to be worried about alienating fans with their trademark stadium rock sound and hopes the legendary music producer – who helmed last LP 'Viva la Vida or Death and All His Friends' - can help make their next LP sound more intimate.

A source told Britain's The Sun newspaper: "Chris is determined not to be seen as a huge commercial rock juggernaut, filling stadiums and cashing in.

"This is the plan to keep them as close to their fans as possible. The band are keen to make hay while the sun shines.

"They have hit a rich vein with their songwriting and feel more creative than ever.'

The band are now hard at work in a church in London, despite only finishing their 'Viva La Vida' world tour in September and guitarist Jonny Buckland getting married last month.

The source added to Britain's The Sun newspaper: 'Jonny has thrown himself into the new album, as have all the boys. The results are really exciting so far.

'Chris had wanted to record while they were on the road but it was just too much. They have this work ethic while the going is good to just keep working as hard as possible."

However, the group – which also includes Guy Berryman and Will Champion – may take a break from work this weekend when it is rumoured Chris will appear on UK TV for the final of singing talent show 'The X Factor'.

The album could be released as early as next year.