The Mineral Products Association says the decline threatens to impact the government's housing plans.
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Trump threatens tougher sanctions after Russia's heaviest strikes on Ukraine
Trump's threat of sanctions comes after Russia's heaviest attack of the war.
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Australian triple murderer jailed for life over toxic mushroom lunch
She will serve a non-parole period of 33 years for killing three relatives and trying to kill another.
Spurs 'not for sale' as owner rejects buyout interest
Board says club's owner has "unequivocally rejected" two expressions of interest in buying it.
Nagelsmann's Northern Ireland comments disrespectful - Craigan
BBC Sport NI pundit Stephen Craigan feels comments from Germany coach Julian Nagelsmann on Northern Ireland were "disrespectful".
'Don't be afraid' - how 'faultless' Alcaraz beat Sinner
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Allen shines as Bills stun Ravens in wild comeback
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'I pretended to be Owen on the street - but you can't compare us'
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Huge drugs bust reveals battles on cocaine 'superhighway'
An audacious attempt to smuggle tonnes of cocaine was stopped, but pressure from drug cartels remains.
'He put his hand down my tights': Sexual harassment widespread among barristers, review finds
Widespread problems with sexual harassment and bullying within the Bar are detailed in a report.
The Papers: 'Barrack to square one' on asylum and 'stop making mistakes'
Plans to move migrants to former military barracks and warnings from Labour figures feature in Monday's papers.
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Mahmood to host security allies for talks on tackling people smuggling
The home secretary will meet with counterparts from the US, Canada, Australia and New Zealand.
Mahmood to meet Trump's US security secretary for smuggling talks
The new home secretary will meet with counterparts from the US, Canada, Australia and New Zealand for security talks.
What it was like inside court as mushroom murderer was jailed for life
The BBC's Katy Watson was in the courtroom as Erin Patterson was sentenced to life.
Palestinian prisoners not being given adequate food, Israel top court says
The court said the state is legally obligated to provide enough food to ensure "a basic level of existence."
Ryan Routh to stand trial for alleged Trump assassination attempt
A court case for Mr Routh, who has pleaded not guilty, begins on Monday - with the defendant representing himself.
TUC chief calls on ministers to show 'whose side' they are on
Paul Nowak will tell his annual conference the government must do more for working class communities.
TUC chief calls on ministers to show 'whose side' they are on
Paul Nowak will tell his annual conference the government must do more for working class communities.