This is Tony Sewell:-
www.theguardian.com/world/2020/jul/16/concern-choice-charity-boss-tony-sewell-head-uk-race-commission
He also blamed black communities (specifically lack of male role models and absent fathers) for educational underachievement in iirc 2010. Now that he seems unable to show that, he has moved on. (interestingly, black educational achievements improved because money was piled into London schools - not because there was nothing to see here , the problem was acknowledged-, which has actually increased other disparities or made them more visible)
He is a well know 'institutional racism denier'. The moment he was put in charge of this commission anyone who knows his work knew what the outcome would be.
Most sociologists also don't like the term 'white working class' but that is being used with merry abandon. It is a bit odd as this government also likes to say that class doesn't exist when it suits them.
I await David Lammy's response with interest.
Sorry, am a a visitor to this corner of MN but knew there would be an interesting discussion here; if that's OK.