In the US, the struggle over adoption by lesbian or gay families concerns those states which prohibit it, either by state law, or (in Florida) by a complete constitutional ban. In the UK, where discrimination against gay or lesbian prospective parents is prohibited by law, the battle is entirely different. Here, the Catholic Church is seeking an exemption from the terms of the law for one of its agencies.
My friend Celia Gardiner, who as a lawyer and as chair of the Roman Catholic Caucus of the Lesbian and Gay Christian Movement, is heavily involved in correspondence with the Charities Commission on the Church's application. I fear I have become totally lost in trying to follow the legal niceties - so don't ask. However, I have undertaken to assist with passing on links to empirical evidence to contradict the claims on which the bishops base their case, so that I can happily share with you.
I have previously pointed out that in claiming that "Catholics" or "the Catholic Church" oppose gay marriage, the bishops (American or British) are being somewhat economical with the truth. It may be what the bishops oppose, it may be what they want the rest of us to oppose - but we do not simply mould our beliefs to episcopal diktat. Contrary to the Vatican line, most American Catholics do not believe that same sex relationships are morally unacceptable, and overall, are in favour or recognizing same sex marriage (that's full civil marriage, not just civil unions).
I have now tracked down similar information specifically on adoption, and guess what? the bishops may oppose it, but Catholics as a whole are in favour. Now note, please, that the data are two years old, from 2oo8 (prior to the US election). All the evidence is that attitudes have moved on since then. For the case of the UK, which prompted my investigation, public attitudes are generally more supportive. Any claim by the bishops that "the Catholic Church" opposes same sex adoption is almost certainly not factually correct. ?