As a child of parents with a range of ethnicities - some of which are unknown, forms that ask for ethnicity can be quite annoying. The question is normally 'Are you x, are you y, are you x + y'?
To be fair the forms have got a lot more varied than when I was a kid, but they still separate ethnicities quite rigidly. Obviously alot of forms ask for ethnicity to gather statistics, so fully understand why the questions are asked.
Filling in forms for my kids normally involves a required question about ethnicity. I raised this with a cousin and they said 'Well they're black, aren't they? Why would you put anything else?! Are you denying that you are black?'.
Obviously black isn't an ethnicity and as my kids are a mix of African, Asian and european and have fairish to brownish skin, black doesn't seem to be a very good description. They arent even teenagers yet, so I don't think it's right to tell them that they're 'black' and ignore their other origins. I have a majority African heritage as far as I know and I'm proud and happy with that. My kids father has European heritage.
I am perfectly open with the kids that they are a mix of multiple origins and they can 'identify' however they want and they are perfectly happy with this and enjoy learning about the history of different countries.
The problem is with family who insist they are black and insist I put them down as black British on forms because that is how they identify. I have never judged or questioned how individuals in my family identity and as far I'm concerned they can identify however they like, but aibu to tell them that they can't tell me and my kids how we should define ourselves?