Britain's Prince Harry's relationship with Chelsy Davy is believed to be back on after the pair were snapped leaving a nightclub together.

The duo were spotted leaving the exclusive members-only Brompton Club in London's South Kensington over the weekend, which was the first time the 26-year-old prince has been seen with the blonde law student since they split last year.

According to friends of the blonde beauty, the pair - who have had an on-off relationship for the past five years - are "head over heels" in love again.

Chelsy's friend Jessica Hay told Britain's Daily Mail newspaper: "Harry and Chelsy are definitely back on and getting close again. They are head over heels in love and everyone agrees they were made for each other.

"They needed to have a relationship break to make them realise how much they want to be together

South African-born Chelsy, 25, is believed to be accompanying Harry to his brother Prince William's wedding to Kate Middleton on April 29, after having grown close to Kate's sister Pippa in recent weeks.

The pair split at the end of last year split after their long distance relationship proved too much, with Chelsy reportedly expressing doubts about training to be a solicitor in London and choosing to return to Africa to spend a gap year travelling the continent.