Britain's Prince Harry wants to expand the work of his African charity, Sentebale.

Despite his duties as an Apache helicopter pilot in Afghanistan, the 28-year-old royal takes his role as patron of the charity very seriously and is constantly trying to improve the lives of children in poverty-stricken country Lesotho, with new plans to help four more countries.

Cathy Ferrier, Harry's right-hand aide, told the Daily Telegraph newspaper: "We have researched nine other countries in southern Africa which have similar problems to Lesotho, with a high number of orphans and high HIV infection rates, and we have a short-list of four countries.

"We still have an absolute commitment to doing all we can in Lesotho, but we want to take the programme to other countries because there is huge unmet need."

Kind-hearted Harry - who set up Sentebale in 2006 with Lesotho's Prince Seeiso to provide schooling, healthcare and meals to children in the mountainous country - has a hands-on role in the organisation and is in constant contact about future developments.

Cathy said: "He keeps in email contact from Afghanistan. If there are any developments I make sure he is aware of them, so if we need his sign-off or need to make sure he is supportive of something I will contact him. I probably email him in Afghanistan every other week."

The charity's modest income would need to be boosted from £2 million per year to around £8 million in four years' time in order to achieve the new goal.