'This can happen. This must happen': Mary Lou McDonald calls for immediate ceasefire in Gaza at London march

The National March for Palestine took place in central London (Lucy North/PA)

Thousands of pro-Palestine protesters have taken to the streets of London, calling for an immediate ceasefire in Gaza.

Around 1,700 police officers patrolled the capital on Saturday, making two arrests for “offensive placards”, as the march made its way to Parliament Square.