A warning that “no ally should pressure Ukraine to surrender” has been made at a Trafalgar Square vigil marking the third anniversary of the Russian invasion.

More than 1,000 people filled the central London square on Monday evening in a gathering also attended by MPs.

The president of the Ukrainian World Congress criticised the US for wavering on its support for Ukraine.

In a pre-recorded speech, streamed on to a large screen, Paul Grod warned: “If Ukraine falls, Europe is next – this is not just Ukraine’s fight, this is a fight for the future of freedom.”

The president of the international non-governmental organisation (NGO), which represents Ukrainian communities in more than 60 countries, described “the horrors, the systemic kidnapping, the torture, and the abuse of Ukraine’s most vulnerable, its children”.