Prince Harry first saw the Halo trust's landmine clearance in Mozambique three years ago and has witnessed the suffering they cause to soldiers and civilians while with the military in Afghanistan.
Some 16 years after his mother's visit to Angola did so much to raise awareness of the problem, mines are still being laid daily.
As ITV News Correspondent Richard Pallot reports, the prince's private visit makes the cause very public once again.
More top news
Two people have died after being involved in separate lightning strikes in Wales' Brecon Beacons today.
France's Champagne and Burgundy wine regions have been granted Unesco world heritage status, as the remit for the title broadens.
A largely dry night ahead for the UK, but showers are set to spread in from the west during tomorrow.