The Girls Aloud singer and the DJ recently rekindled their romance after calling off their engagement last year but now friends have revealed they have broken up once more and this time it`s permanent.

One pal told the Daily Mirror newspaper: "It`s over. And this time it`s for good. Too much has gone on for them to move forward. Sarah is now single and focusing on work."

Earlier this week, it was reported Sarah - whose brief relationship with ex-boyfriend Theo De Vries ended after a drunken holiday bust-up on New Year`s Day (01.01.12) in Austria - and Tom had decided to give things another go because they couldn`t live without each other.

A source said: "Sarah and Tom just can`t be without each other. They split because of their arguing but that`s really improved since Sarah went to rehab last year."

Another friend said: "Tom`s been round a lot. They`re giving things another go but very tentatively while she gets better."

Sarah spent time in rehab last year where she was treated for alcoholism and depression and also revealed it took three weeks of intensive treatment to help her break her dependence on prescription drug Zopiclone, which she started taking in 2006 to help her with sleep problems.
sections: Celebrities