Whatever happened to the DeepMind AI ethics board Google promised?

When the search giant bought the artificial intelligence company, part of the deal was setting up an ethics board. Three years on, where is it?

Three years ago, artificial intelligence research firm DeepMind was acquired by Google for a reported 400m. As part of the acquisition, Google agreed to set up an ethics and safety board to ensure that its AI technology is not abused.

The existence of the ethics board wasn't confirmed at the time of the acquisition announcement, and the public only became aware of it through a leak to industry news site The Information. But in the years since, senior members of DeepMind have publicly confirmed the board's existence, arguing that it is one of the ways that the company is trying to "lead the way" on ethical issues in AI.