Police have urged those attending Anzac Day commemorations and the London Marathon this weekend to "remain vigilant and alert".
Scotland Yard carried out a review of security arrangements for events planned tomorrow in the UK to mark the centenary of the Gallipoli Campaign after an alleged plot to carry out an attack at a parade in Melbourne, Australia.
Anzac Day was established to mark the anniversary of the start of the First World War Gallipoli campaign and ceremonies are held on April 25 each year in memory of Australian and New Zealand soldiers who have died in battle.
This year's events take on extra significance as the centenary of the conflict in Turkey is marked.
Although no specific threat against British events has been identified, police are urging the public to remain on alert.
Deputy Assistant Commissioner Neil Basu said: "Ahead of a number of major public events in the UK this weekend, including Anzac Day commemorations and the London Marathon - and in light of recent alleged plans to attack Anzac Day events and police officers overseas - we are reminding the public to be vigilant.
"While there is no information to suggest a specific threat to these events in the UK - and the current national threat level remains unchanged - we would like to reiterate our long-standing advice to remain vigilant and alert.
"As ever we would urge the public to get in touch to report anything suspicious by calling the confidential anti-terrorist hotline on 0800 789 321 or in an emergency by calling 999.
"We would like to reassure the public that police forces have reviewed security plans for this weekend's events to ensure they are safe and secure for all those attending or involved, and that the public are encouraged to continue with their plans to attend or take part in these great events."