The Metropolitan Police is reviewing security arrangements after a terrorist plot was foiled in Australia.
Five teenagers were arrested on suspicion of plotting an Islamic State-inspired terror attack at a war memorial event in Melbourne.
The suspects included two 18-year-olds who were allegedly planning an attack at the Anzac Day memorial ceremony, commemorating Australian and New Zealand Army Corps' First World War battle in Gallipoli on April 25
Scotland Yard announced tonight that security will now be reviewed at related events in London and across the UK.
Australians and New Zealanders in the UK traditionally observe the occasion by holding services in Westminster and at Hyde Park.
Metropolitan Police Deputy Assistant Commissioner Neil Basu said: "Following counter-terrorism arrests in Australia this weekend and allegations of attack planning against Anzac Day commemorations and police officers in Australia, we are reviewing security plans at related events in the UK.
"We already have protective security plans in place for major Anzac events in the UK but as a sensible precaution all forces have been asked to review security arrangements at related events to ensure they are safe and secure for the public and officers.
"While there is no information to suggest a specific threat to related events in the UK - and the current UK threat level remains unchanged - the public should remain vigilant."
Next week's commemorations are due to begin with a dawn service at Wellington Arch, Hyde Park Corner, at 5am on Saturday, followed by a wreath-laying ceremony at the Cenotaph and a commemorative service at Westminster Abbey.
The annual Anzac Day ceremonies take on extra poignancy this year, marking the 100th year of the Turkish conflict.
Australia's government has raised the country's terror warning level in response to the domestic threat posed by supporters of the Islamic State group.
In September last year, the group's spokesman, Abu Mohammed al-Adnani, issued a message urging attacks abroad, specifically mentioning Australia.
