Girls Aloud will definitely reform in 2011 but without Nadine Coyle, says a report.

It’s claimed that Sarah Harding, Cheryl Cole, Kimberley Walsh and Nicola Roberts have grown apart from their Irish bandmate.

A source told The Sun: “It’s been a painful decision… but they have decided that the future of Girls Aloud lies without Nadine.

“Relations with her had been strained within the camp for a while.”

Since going on a break last year Cheryl has launched her solo career and starred on the X Factor, Sarah has started an acting career, Kimberley is presenting Viva’s Suck My Pop and Nicola has started her own make-up range.

Nadine has spent much of the past 12 months in the US and has so far struggled to launch her solo career.

The source said: “Disputes began cropping up towards the final days of the band before they went on a hiatus. The four remaining girls want to return on their own terms.”