I see it has emerged that the fiancee of the Queen's grandson, Peter Phillips, is a baptised Catholic. OK, so they've been living together for years, and her given name is Autumn, which wasn't a saint's name last time I looked. And nobody knows whether she's a practising Catholic. But her mother is quoted as saying that Autumn is "proud of her religion".
The trouble is, under the 1701 Act of Settlement, which is still in force, monarchs and their heirs are forbidden to become or marry Catholics. There are apparently only two solutions: he must give up his right to the throne, or she must "formally give up her membership of the Church".
Of course, there is a fairly recent precedent - when Prince Michael of Kent married a Catholic, he gave up his right to succession. He was eighth in line to the throne at the time of their marriage, while Peter Phillips is currently tenth in line.
So you might say, who cares? It's highly unlikely he's giving up anything that would ever come to fruition, and a lot of people, even here in Britain, don't care about the British Royal Family anyway, and would be quite happy if the country became a republic.
But we should care. In fact, we should be making a real song and dance about this. Religious discrimination is supposedly forbidden by law in this country. And yet we still have a law on our statute books which directly discriminates against Roman Catholics in particular. What's more, it hasn't just remained on the statute books because everyone's forgotten about it - John Gummer attempted to have this outdated law overturned earlier this year, pointing out in his speech some of the other ways in which Catholicism is still legally discriminated against in the UK today.
You could say it's important for our monarch to be a member of the Church of England, since they are the titular head of the Church of England. But the law doesn't forbid royals to become or marry atheists, Buddhists or Moslems. No, it's just Catholics who are singled out for special treatment.
Time after time after time we have seen Catholicism treated with suspicion, disrespect and downright hostility. Look at the comments to the Daily Telegraph article I linked to at the start of this post - this one could have come straight from the most hardline leader of the Chinese Communist Party:
"Should any of his children come to the throne then the Pope will have authority over them."
Oh yes, the old "Catholics are ruled by a foreign power and so shouldn't be trusted because they're unpatriotic" argument.
Why is it that Catholics are the one minority that it's still acceptable to discriminate against in modern Britain?
I'll be interested to see if the people who bang on about civil liberties and human rights take up the cause for the repeal of the Act of Succession. My money's on them doing absolutely nothing of the sort.