There is no way that the Abortion Act is going to be repealed in the foreseeable future, so let's support campaigns which at least reduce the number of weeks during which abortion is legal, says one side, supported by the two Cardinals: Damian Thompson convinced me this was the right course to take.
Then, via Fr Boyle, I read a book review by Colin Harte which turned me the other way: "when we exclude 'the last and the least' from proposed abortion legislative reform we thereby exclude Christ himself. Restrictive abortion legislation, he emphasises, 'always excludes from protection some unborn children equally entitled to protection'."
Then Fr Mildew reminded me that "Politics is the art of the possible" and made me think that there has to be some realism.
It was, however, reading an Anglican blog that turned me back to an absolutist position. Do not click on the link that follows if pictures of the results of abortions are likely to disturb you - at least disturb you any more than pictures of such atrocities really should. The poster - Cranmer - writes a witty and incisive blog on political and religious matters. He is a mainstream member of a disappearing denomination with fairly conservative views, among which are that the Church in England and Wales is a foreign mission to these shores, but every now and then he is spot on.
I'll repeat the warning: in fact, I'll copy the author's own warning: "this article contains images which some may find disturbing. Cranmer makes absolutely no apology for publishing in all its ugliness the barbaric and depraved depths to which the United Kingdom has sunk. May the Lord have mercy."
This post convinces me.