Conservative peer Lord Ballyedmond, who was among four people killed in a helicopter crash in Norfolk, had previously raised safety concerns with the aircraft's manufacturers.
AgustaWestland said they were investigating but that "there could be many causes" behind last night's crash.
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The Islamic centre where the Manchester suicide bomber is thought to have prayed says the attack "has no place in Islam or any religion".
German chancellor Angela Merkel and Indian prime minister Narendra Modi among those to praise "great spirit" of Manchester people.
The bomber's identity has been confirmed by Greater Manchester Police.