Roben Antoniewicz took the picture on his grandaughter's second birthday

Scottish photographer Roven Antoniewicz shot the photo, 2nd Birthday, of granddaughter Mairead the day before her family left Scotland.

The shot was the winning picture in the National Portrait Gallery's Schweppes portrait award announced on Tuesday.

"In some ways this is an idealised vision of Mairead," Mr Antoniewicz said of the picture.

"She's wearing a Victorian-style party dress and she resembles a porcelain doll. At the same time there is a tension in the photograph," he said.

Twins picture

"The following day she was leaving Scotland with her parents to live in Manchester. I don't know whether Mairead sensed the family's trepidation at this, but she seems apprehensive and hesitant."

The picture has been unveiled as part of the Schweppes photographic portrait prize exhibition which runs at the gallery from Wednesday until 15 February.

Another shortlisted photo was Charlotte, by Adri Berger

The second-placed photograph was taken by fellow Scot Victor Albrow of the red-headed twin sons of a friend, Lachie and Callum.

In third place was Alan Powdrill, a former cruise ship's photographer, who took the photo of Gerry, a man sitting behind a desk in a stark office.

The �5,000 Deloitte Award for the best photograph taken by a photographer under 25 was won by David Yeo, 19, for his group portrait Brothers and Sisters. The photograph shows his three cousins Jeffrey, Sam and Rebecca.

The National Portrait Gallery's director Sandy Nairne hailed the quality of photographs for the inaugural event.

He said: "The Schweppes Prize had an outstanding entry for its first year and now the public have the chance to come and see some great winning photographs. Roben Antoniewicz's 2nd Birthday stood out as an remarkable image of innocence."