The agency has previously launched two appeals against the act, both of which have been denied. The Charity Commission turned down the request to change Catholic Care’s charter to limit adoption to heterosexual couples, a decision that was later upheld by the charity tribunal.
Lawyers for the charity say discrimination on the grounds of sexuality would be lawful under section 193 of the Equality Act 2010, which allows discrimination provided it is a "proportionate means of achieving a legitimate aim".
The agency feel that if they are forced to provide services to same-sex couples they will lose their Church funding, and will no longer be able to provide vital adoption services.
Naomi Phillips of the British Humanist Association said at the time:
“When groups are providing public services, not least vital services such as adoption, it is legitimate to prevent unjustified discrimination, as the law seeks to do, in order to ensure that those services are equal, accessible and operate in the interests of those they are helping.”
The Alternative Parenting Show is taking place at the Grand Connaught Rooms on Saturday 15th September to help same-sex couples as well as gay and heterosexual singles who want to have children of their own or are looking to adopt. Tickets are available online for £8 on www.alternativeparenting.co.uk