Deputy Lindsay de Sausmarez laid a wreath at the Cenotaph in Whitehall on Sunday on behalf of the Bailiwick.
The Policy & Resources President was on international duty as she laid the wreath as part of the National Service of Remembrance in London.
The islands have been represented at the service since 2019 to honour and remember those who fought and died in both World Wars and other military conflicts.
Representation at the event has been shared between Guernsey, Alderney and Sark officials with Deputy de Sausmarez invited this year.
Deputy de Sausmarez said she was privileged to attend the service “on behalf of the people and governments of the islands of Guernsey, Alderney and Sark.
“This act of remembrance is important to all our communities to commemorate the contribution and sacrifice of men and women from our islands during the two World Wars and other conflicts.”
After the Royal Family and the UK’s political leaders had laid their wreaths, Deputy de Sausmarez stepped forward alongside the representatives of the other Crown Dependencies and the Overseas Territories.
Dressed in black, wearing a black hat with a red poppy embellishment, Deputy de Sausmarez laid her wreath on behalf of the Bailiwick.
The BBC’s commentator, Petroc Trelawny introduced the group and mentioned that the Channel Islands were the only part of the British Isles to be occupied by the German forces during World War II.