The sweethearts' safari

In bandana and sunglasses, Prince Harry appears to be feeling the heat on his safari holiday.

Perhaps that grey woolly sweater has something to do with it.

Or maybe the rather hectic pace of his week-long break with girlfriend Chelsy Davy is catching up with him.

The couple, who started their holiday with a challenging three-day trek on horseback, enjoyed a more relaxing day yesterday as they were taken on a game

viewing tour in an open-topped jeep. As temperatures touched 100F, they watched for wildlife in the Moremi Game Reserve near Maun in Botswana.

Miss Davy, the daughter of a Zimbabwean millionaire, was more used to keeping her cool than Harry.

The 19-year-old university student wore a light turquoise and white top and pulled her hair back from her face.

Their Botswana break is their last chance to be together before Harry, 20, heads to Sandhurst for his Army officer training on May 8.

Their holiday accommodation has ranged from ?20-a-night rooms to the luxury of a ?1,000-a-night suite.

They have also slept under the stars and enjoyed outdoor candlelit dinners.

The holiday is due to end on Wednesday when Harry flies home to England and Miss Davy returns to Cape Town where she is studying commerce.