This subject came up, on Wednesday, and I thought I would signpost you all to some sites and networks... that may be useful in the future.
http://www.pipacampaign.com/ PIPA supports carers and parents in performing arts, in many ways. They also have a best practice charter which employers can sign up to.
I would also encourage you to follow and join @EquityWomen https://www.equity.org.uk/getting-involved/committees/womens-committee/
The Women's Committee advises the Council and takes action on any equal opportunities matters and discrimination on the grounds of gender relevant to the professional employment of Equity members.