Child announced they are changing schools and moving to love with wealthy relatives 250 miles away.

[whattheactualfcukhashappened]

Child has turned 17 recently. Text on mother's day to say they were going to grandparents for weekend. Fair enough a bus ride away.
Fast forward they are staying with my sibling and their partner for Easter.
Text to say they are going to live there, 250 miles from where we live and have secured a place at college to complete A levels.
My sibling and their partner are extremely well off whereas I'm financially secure following an inheritance.
According to my child she organised the change of colleges with her previous collage and a plan was put in place to enable the transition.
This news was told to me yesterday.
Child was 16 when she last attended her college.
I'm not going to go into too much detail about the family dynamics, I just need advice.
I wasn't consulted about this change of circumstances by their college, sibling or indeed my own child.
Surely this arrangement can't be put into place without my consent?
Is it even legal?
I'm heartbroken but like I said, I won't try to drip feed or cloud judgment by adding personal details.

She hasn't been brought up by her, though. She's been brought up by you, and is now having a year's boarding school type experience where she can redefine herself and start afresh.

Try and see it as a boarding school with amazing extra curricular activities.
She's learning and gaining experience, even if her education isn't her prime concern right now.

DS1's best educational experience was at Uni. He didn't get a degree, but he ran a car, worked part time, lived with randoms and went to the pub regularly. That was huge for a kid with ASD and only one friend.

I'm not neurotypical either.
My DD is incredibly studious though, spent hours studying every evening and weekend. Very academic and couldn't wait to go to University.
She's also leaving to drive but turned down my offer to pay for lessons as she said she didn't to drive until she started a career.
I think this move was planned in advance .
I need to find out the legalities of not being in full-time education under the age of 18.
I'm glad it worked out well for your DS, it's tough when you're mind is wired differently.

Update...
Have spoken with DC just twice since they left. Very brief conversations telling me they were happy and working full time in a restaurant.
Since then ,nothing.phone goes onto voicemail, text messages go ignored.
With hindsight I can see this was planned a while back. I asked DC where they would like to ho for a summer holiday as it's something I could never afford until recently. They said they couldn't take a break because of studies.
They also stopped contact with their long standing friends, preferring to go to the gym , or meeting up with new friends instead.
I'm unable to contact sibling, My DM gave me a number but it's not recognised .
DM has now blocked me so I can't call her.

I'm so sorry 😞

Has anything changed in the last week or 2?

Have you visited your DC yet?

Not visited yet. I can't...they don't want to see me, all this is my fault apparently.
Things weren't going great, usual parent teenager troubles. Not going off they rails.
I've always known it was my DSibling and lL's wish to raise DC as they have asked DC if they'd like to go to school in their county.
She's been seduced by the wealthy lifestyle, beautiful surroundings and their success. Not yo mention how loving and nurturing they are( yeah, I didn't so much as get a phone call from them)
Every effort I have made to raise my DC well has been ( covertly)belittled on the rare occasions we meet.
DM ( GM) thinks the sun shines out of their arses and they can do no wrong so she's no bloody help in getting her home.
As I've mentioned before DC is very bright and studies for hours each day.
DC recently went on a work placement and loved it so. decided that she was going to consider changing some A level subjects that may help in their career path.
I suggested they don't as they were making good progress and it would put them back a year at college.
FWIW I've always supported them in making their own choices regarding A levels.
Sorry if I'm waffling, I'm trying to process what has just happened.