Waiting for negative before ending isolation

[Rekorderlig88]

Help!
I'm in Scotland and not sure what to do.
5 year old tested positive last Saturday the 20th.
V mild symptoms
Fine now.
Lateral flow still showing positive.
Now away nack it was said you could test positive for some time after infection.
Now it seems she csnt come out of isolation till Tues? Is that correct?

Yes that's correct.

Yes, day 0 is the day the test was positive, so 10 days after that is Tuesday.