More than £4 million ($5.2 million) was stolen from 23 law firms by cybercriminals in the past three years, the Solicitors Regulation Authority (SRA) has said.

In a conference about cybercrime, the regulator said that during visits to 40 law firms to understand the impact of a cyberattack, they found that firms lost an average of £60,000 (more than $77,000) of client money in every successful attack.