Israel must act now to let aid through and save lives in Gaza. Britain has a plan to help that happen | David Cameron

With crossings opened for longer, water supplies restored and UN staff able to safely distribute food, we can limit the scale of this catastrophe

It was heartbreaking to read the latest independent assessment of hunger in Gaza. The situation is desperate - and projected to get worse. According to the World Food Programme (WFP), nine out of every 10 Palestinians in northern Gaza may be eating less than one meal a day.

With families displaced and sanitation close to nonexistent, disease and illness will spread. Almost 40% of Gaza's population is aged under 15. Death and despair haunt these children's lives. We all know we must act. The question is how.

David Cameron is Britain's foreign secretary