Prospective Transport for London (TfL) panel firms must provide diversity statistics to the company to help its decision-making process.
TfL legal and compliance director Gareth John said he is nearing the end of his panel review and is asking firms for details on the policies they have in place to foster diversity.
"Diversity is at the heart of the London Mayor's core values," said John. "That filters through and is very important to us. I'm asking the firms pitching for a place on the panel for a list of information pertaining to diversity, such as who's in charge of diversity and what they're doing to attract a diverse team."
Firms that secure places on the panel have to provide John with quarterly updates on the issue. The updates must include diversity statistics as well as information on if and why lawyers from minority groups leave the firm.
"Barriers to entry for minorities mean you miss out on talent, while a diverse workforce better serves clients," said John. "I want to extend this to the law firms we use."
Firms that have submitted bids for TfL's panel include Bird & Bird and Herbert Smith.