If you are successfully registered under Section 4L then it would be orders of magnitude cheaper to simply register your daughter as a British citizen via Form MN1 for £1,214. The IHS alone for the five years of a UK Ancestry visa currently sits at £5,175 and that's before you worry about the application fee, ILR fee and the cost of naturalisation.

That’s what I thought, but I’m always looking for a more informed opinion lol. Thanks!

In a rare piece of good news regarding Home Office fees, the fee for child registration is dropping from £1,214 to £1,000 from 8 April so even more reason to register your children.

I am also in these shoes and I find it ridiculous that only a small subjection of people are excluded. I am a 4L citizen now and my 2 kids under 18 can both reigster as citizens through me; but my 22 year old kid and 29 year old kid cannot. It doesn't seem right at all, given it was all because of the government not fixing gender discrimination. Saying I needed to live in the UK 3 years to pass it onto my over 18 kids is crazy because the same requirement isn't posed onto my under 18 year old children. It's not treating my kids equally in light of the gender discrimination. Anyone have further commetns or ideas?

There have always been situations like this in British nationality law, where outcomes between siblings or family members can seem very unfair.

My British born grandmother gave birth to five children abroad. All but one, including my mother, were born before 1961. The youngest aunt was born after 1963 and, before her 18th birthday, she was able to register as a British citizen because there was a very narrow window that allowed those born after 1963 to register before turning 18.

That aunt then lived in the UK for many years, while all of her older siblings were not even recognised as British until 2010, by which point they were all already in their 50s or older. That seems incredibly unfair too, right? But there was simply no legal route available for them at the time.

Your best option is probably to discuss this with British nationality experts. Sable International and BIC-Immigration are very good.

If there had been no gender discrimination then none of your children would be eligible to be registered as British citizens, regardless of their age.

I agree and I have pointed out that out in similar circumstances. That said if one had acquired citizenship at birth vs. much later in life it would at least been possible to move to the UK while the kids were minors. That said I think most American's vastly overestimate the likelihood they would have done this. I stumbled across 4C/UKM sometime around late 2003 or early 2004 and qualified then to register as a UK citizen then (I was born in late 1960s). At that time I seriously considered moving to the UK. I had grown up in Europe and though I never lived in the UK we visited my mom's family there for most breaks as it was a lot closer than flying back to the US. However, I just couldn't make the numbers work. My salary would have been at least 30% lower in the UK then and my then wife's job was not particularly transferable to the UK. While I might have been willing to take a 30% cut in my salary, also losing or taking a bigger cut on my wife's was a non-starter. The one British citizen by descent US citizen I know who did actually move to the UK so his kids would qualify for British citizenship worked (along with his wife) in Silicon Valley and did well enough that they could move to the UK and live off their savings (they basically retired early and had their kids late). So while I get OPs frustration sometimes you just have to consider the glass half full.