I'm not in Scotland but it does work the same here with growth scans.
So with my daughter, they couldn't get her measurements properly, so has the opposite to you and it looked like she jumped up the charts after 3 scans of dropping.
And they just shrugged it off basically.
I've never had an accurate growth scan.
They estimated my second to be 7lb2 at 40 weeks. She was born 5 days later 11lbs.
And this time around, they estimated her to be over 9lb at 40 weeks. She was born 6 days later at 6lb14.
If they can't get the head measurement properly, it will completeeeelyyy change the measurements.
Which will be why the doctor isn't worried and they're happy to just give you another scan next week
You can 100% refuse induction if you don't want it