An investor initiative led by the Church of England Pensions Board is intensifying pressure on mining companies, after almost 70% of the sector failed to provide safety information following a Brazilian mine disaster that cost more than 230 lives.

Alongside the council of ethics for Sweden’s AP funds, the country’s national pension schemes, the board is leading a move to improve safety at sites like the Brumadinho iron-ore mine in the state of Minas Gerais, where the collapse of a dam in January left hundreds of people dead. The mine is owned by Vale.