Tory donor was key shareholder in Grenfell cladding firm Arconic

Exclusive: Most recent donation in 2017 was year plastic-filled panels contributed to rapid spread of fire

A major shareholder in Arconic, the company that made Grenfell Tower's combustible cladding, donated nearly 25,000 to Boris Johnson and the Conservative party, it has emerged. The most recent donation was recorded in 2017, the year in which Arconic's plastic-filled panels were the main cause of the rapid spread of fire that killed 72 people.

The bereaved and survivors on Tuesday night called on the prime minister to return the money to Elliott Advisors UK, the British arm of a US private equity company that has a 10% holding in the $14bn (10.4bn) annual turnover business.