Other Remembrance Sunday ceremonies are taking place across the country and around the world, including in countries where the armed forces are now deployed, such Afghanistan, Estonia and South Sudan.
On another balcony, Countess Sophie, the Duchess of Sussex and Princess Anne's husband, Vice Admiral Timothy Laurence watched on.
A two-minute silence was held as part of the Remembrance Sunday commemorations.
The pair were joined in laying wreaths by Liberal Democrat leader Jo Swinson, SNP Westminster leader Ian Blackford, the DUP's Westminster leader Nigel Dodds and newly elected Speaker of the House of Commons Lindsay Hoyle.More news: Death Stranding will be coming simultaneously on Steam and Epic Games Store
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They stood with heads bowed as Big Ben tolled 11am, and a two-minutes' silence was marked by the firing of a gun by the King's Troop Royal Horse Artillery and buglers sounded the Last Post.
Leo Varadkar laid a wreath at the war memorial in the town.
Queen Elizabeth II and Catherine, Duchess of Cambridge attend the annual Remembrance Sunday memorial at The Cenotaph on November 10, 2019 in London, England.
Hundreds of armed forces personnel will also be present at the occasion, alongside Cabinet ministers, religious leaders and representatives of Commonwealth nations.
John Rankin, the Governor, said: Bermudians fought with Allied Forces in both World Wars and we rightly honour their contribution each year on Remembrance Day in Bermuda.
The annual Royal British Legion Veterans' Parade followed the service, in which thousands of veterans from the Second World War or more recent conflicts marched past the Cenotaph.