Asking children to remove what could be seen as protective clothing without any support from the Laws of the Game could be a very easy way to get on the wrong side of a lawsuit or some idiotic child protection action.
And asking muslim girls to do the same could be very destructive.
I see it as instructive that your internet search could only find an American account of a French request for clarification - and not many Americans speak enough French to double check the FFR website. I've never seen it in frequent trawls through the iRB website, though that is not to say it is not there. The RFU has issued no statement on this subject that I'm aware of, and when we've discussed it on here there has been no raised eyebrow from NZ, Aus, Wales or Scotland (I don't think Donal was carrying the Irish flag for us at the time) suggesting that the RFU has been remiss in its laxitude.
I'd say relax: there's no real issue to address, plenty of downside, no significant upside: don't expose yourself or your club to the grief that would go with the decision. In adopting that view, you'd be in full accord with the Old Farts at Twickers!
Welcome to the forum, by the way. Nice to have a fitfatbloke on here, rather than the more usual type.:wink: