In pictures: Gallipoli centenary ceremonies

The centenary of one of World War One's bloodiest campaigns, Gallipoli, is being marked with a service on the Turkish peninsula which gave the campaign its name. There are also events taking place in Australia and New Zealand, which lost thousands of troops.

Prince Harry meets crew members as he attends a reception on HMS Bulwark with relatives of veterans of the Gallipoli CampaignPA

Prince Harry was among the dignitaries who met sailors and relatives of those who fought in the campaign

Turkish soldiers wait before the commemoration of the Battle of GallipoliEPA

Turkish troops are also taking part in the commemoration. Ottoman forces lost 86,000 men in the campaign

Britain's Prince Charles salutes in front of the memorial in AbideReuters

Prince Charles and Turkish President Erdogan both laid wreaths and gave speeches at the service at the Abide memorial

A picture of Cpt Herbert Hunter from 7th Australian infinity is seen on a wall at the Helles MemorialAFP

Another ceremony is being held at the Helles Memorial, where this picture of an Australian soldier has been displayed

Australian Prime Minister Tony Abbott reads a message left at the Shrapnel Valley cemetery near GallipoliEPA

Australian Prime Minister Tony Abbott is expected to speak at the service

A seagull flies over a sea of poppies blanketing Federation Square in Melbourne as part of commemorations ahead of Anzac DayEPA

The centenary is also being marked in Australia and New Zealand. Here a seagull flies over poppies laid over Melbourne's Federation Square

Soldiers march through a sea of poppies during a street parade to commemorate Anzac Day in Wellington, New ZealandAP

In the New Zealand capital Wellington, soldiers took part in a street parade ahead of 25 April, which is marked as Anzac Day

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