The Queen has led tributes to those who died fighting for their country on Remembrance Day on Sunday.
She laid a wreath at the Cenotaph war memorial and a two-minute silence took place at 11am.
Around 10,000 former members of the military and members of the public took part in a march past the memorial.
To mark the day, 20 war veterans are using an old way of passing on messages called semaphore to transfer a silent message along London's River Thames.
The message started in Greenwich in east London and will be decoded at Whitehall before being placed on a wreath at the Cenotaph.
Other services of remembrance will also take place across the UK, to remember those who gave their lives in conflicts that have happened both recently and a long time ago.
Leading politicians also laid wreaths at the Cenotaph, and representatives of different faiths took part as well.
The two-minute silence came to end when Buglers of the Royal Marines sounded the Last Post.