You're right, we don't see it a lot on here, so unless ksand knows the answers to your questions, or vinny posts, you will see lots of parents using MN1 on immigrationboards.com
Unfortunately I don’t know much about it, because we don’t often see people on this forum registering their children after living in the U.K. for 3 years.
In most cases, the people on the forum who have registered as British have done it from the US, because they qualify for UK citizenship through their parents (I.e. people born before 1983 to a British mother who couldn’t previously claim UK citizenship), and usually by the time they post on the forum they have already applied and/or had their application processed.
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