The Foreign Office said it is not changing its travel advice to Thailand because it already contains a warning about the dangers of unprovoked attacks by gangs on the island of Koh Phangan. Members of Mr Ashton's family are being offered consular assistance, officials said.
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Tobias Ellwood ran towards gunfire to give mouth-to-mouth resuscitation to Pc Keith Palmer after he was stabbed by Khalid Masood.
The terror attack carried out by Khalid Masood at Westminster that left four people dead lasted less than two minutes say police.