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The 25th anniversary of the Piper Alpha disaster, which claimed the lives of 167 people, has been remembered at a ceremony in Scotland.
The North Sea platform was engulfed in a ball of flames after a gas leak ignited on July 6, 1988.
Hundreds of people today attended a commemoration service in Aberdeen in memory of those who died.
They were joined by politicians, senior figures from the UK oil and gas industry and representatives from the Pound for Piper Trust.
Lessons are being learned to make sure an offshore disaster never happens again, the Secretary of State for Scotland Michael Moore said to mark the 25th anniversary of the Piper Alpha disaster.
Mr Moore said: "It is important that we never forget those who have lost their lives in our oil and gas industry. 25 years on from Piper Alpha, the loss of 167 lives is something that families and communities across the whole country are still coming to terms with".
Safety improvements in the offshore industry are a "lasting memorial" to the 167 people killed in the Piper Alpha disaster, the Prime Minister has said.
In a letter to Malcolm Webb, chief executive of industry group Oil & Gas UK, David Cameron said:
The names of all 167 people who died in the disaster will be read by representatives from the oil and gas industry and floral wreaths will be laid at the memorial.
Roy Carey, 70, from Ayrshire, was one of 62 survivors and will be attending the service. "It gives me a chance to reflect on it. I do feel it's the only place where I feel a little closer to the lads that never made it," he said.
"A rig can now only burn the fuel that is on board which was not the case on the Piper Alpha. This should prevent a disaster to that extent happening again, but because that is happening in the North Sea doesn't mean it is happening worldwide but it really should be,"
"Safety, with science, should get better not worse and I'm hoping that improvements will be ongoing all the time".
The 25th anniversary of the world's worst offshore disaster, in which 167 men were killed, is being remembered today.
The North Sea tragedy happened on July 6 1988, when explosions and a fireball ripped through the Piper Alpha oil rig.
The service, due to take place at 11am at the North Sea Memorial in Aberdeen's Hazelhead Garden, will begin after the flypast of an RAF Sea King helicopter from Lossiemouth. This was the first aircraft to arrive at the scene of the disaster 25 years ago.
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A service of remembrance was held to mark 25 years since the Piper Alpha disaster. 167 men were killed in an explosion on the oil platform.