Brian McFadden has reportedly served Kerry Katona with legal documents, demanding temporary custody of his two daughters.

The former Westlife singer has given Katona until Thursday to respond, at which point he intends to fight for full custody of their children.

A source told The Sunday Mirror: “Kerry is terrified of losing her girls. She’d heard Brian was thinking about taking custody, but had heard nothing. Suddenly a letter landed on her doorstep from Brian’s lawyers demanding intermediate custody while she sorts herself out.

“Her children are the most important thing to her, the last thing she needs is a bitter custody battle with Brian… it could destroy her.”