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The government may have understood as long ago as 2002 that Grenfell-style aluminium composite material (ACM) should not be used on high-rise buildings, a former director from the 好色先生TV Research Establishment has said.

Debbie Smith, a former director at BRE, was quizzed by the Grenfell Inquiry yesterday about the government鈥檚 understanding of a failed safety test of polyethylene-cored ACM cladding carried out in 2001.

The results of the test, carried out by BRE on behalf of the government, were delivered to officials in 2002.

Richard Millett QC, lead counsel to the inquiry, asked Smith whether the government understood 鈥渢hat ACM panels with a polyethylene core should never ever be used above 18 metres鈥�?

Smith answered 鈥測es鈥� 鈥� providing the government believed the testing results were representative of a wider problem with the use of the material.

But she added: 鈥淭he bit that I can鈥檛 accept is that the government had taken the view that they should not be used.

鈥淚 mean, I don鈥檛 know that. All I can say, and as far as I can go, is that the results were reported within the context of the outputs from this project.鈥�

The tests were commissioned following two fires which spread rapidly up the outside of high-rise buildings in 1991 in Knowsley Heights, Merseyside, and in 1999 in Garnock Court, Irvine.

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The ACM panel used by the BRE in the test was rated 鈥楥lass 0鈥� - meaning it was considered suitable for high rise buildings under official guidance.

BRE鈥檚 report to government said the 鈥渁luminium sheeting material鈥� satisfied Class 0 but 鈥減roved to be one of the worst performing products鈥� in the large-scale test. It added that 鈥渢hese issues require further consideration鈥�.

The inquiry continues.