Only thing I can find on the John Lewis site is this page about diversity and inclusion
We positively celebrate diversity & inclusion in the John Lewis Partnership. Truly embracing individuals contributions, regardless of their age, gender, ethnicity, disability, sexuality, social background, religion or belief. Having a diverse and inclusive business is vital for our future success and that’s why it is at the heart of our ultimate purpose; the happiness of all our Partners.
www.jlpjobs.com/about/diversityandinclusion/
Gender instead of sex again. Looks as though they've drunk the Koolaid too, I'm afraid
There's a GEN (Gender Equality Network) focuses on gender equality. It empowers Partners to overcome barriers and be more involved in Gender topics outside of their day job
and a Pride in the Partnership was the first network to develop in the Partnership and supports the LGBTQ+ community and their allies. They are focused on enriching the happiness of Partners through increased visibility and support. They regularly attend and celebrate Pride events across the UK
so I'll be amazed if that manager's suggestion of single-sex fitting rooms comes to anything, tbh