> What's always missing from stories like this is how the crooks get the money out.

It is in the article:

The fraudsters had told her to shift her "at risk" cash to an account on a cryptocurrency platform that they emptied - while isolating her from family by stressing secrecy and coaching her on how to respond to sceptical bank officials. "They knew the name of my financial adviser, they were utterly convincing as FCA staff," she said. "And they told me I could not tell anyone about the investigation as it would damage their efforts to catch the crooks."