clinker

"She has made enough ridiculous rulings in this case that nobody should be surprised if she makes another clinker," he told Salon.

"I had a vague idea from previous work that if it were possible to crush old concrete, taking out the sand and stones, heating the cement would remove the water, and then it would form clinker again," said first author Dr Cyrille Dunant, also from the Department of Engineering.

"We found the combination of cement clinker and iron oxide is an excellent steelmaking slag because it foams and it flows well," said Dunant.

Glass bottles, ceramics, coal fragments, ash and clinker were thought to be filling material for the pond.

Mr Clinton said Brexit and the trading arrangement that followed had thrown a "clinker" into Northern Ireland's politics.