"Bodyguards" began patrolling demonstrations in Cairo's Tahrir Square at the weekend, aiming to keep women safe from sexual assault.
The UN said it has reports of more than two dozen sexual assaults on women on their way to or at the latest wave of mass protests against Islamist President Mohammed Morsi.
In one case a woman was raped with a blade while at a Tahrir rally. Police rarely intervene in the assaults.
Foreign Minister Alistair Burt's admission that the Cameron government has "supported" a survey of attitudes to US drone strikes in Pakistan's tribal areas amounts to a tacit admission of British involvement.