The demonstrators first target was the BBC, where they then marched onto the Saudi Arabian Embassy before pushing on towards Downing Street.
It has been over 5 years since the Saudi-led coalition began bombing and blockading Yemen. In that time, western powers, like the UK, have profited greatly via arms sales to anti-Yemen Arab regimes.
The UK's leading arms dealer BAE Systems made £2.5 billion from Saudi in 2019 alone and £15 billion between 2015 and 2019.
With more action planned by event organisers for next week, perhaps public attention will finally being to shift towards Yemen, the world's worst man-made humanitarian crisis.