Isolating question

[Timepasses]

I have looked online but can't seem to find a definitive answer.

DS1 tested positive and his isolation period ends on 19th November.

DP tested positive yesterday. Symptoms started 13th November.

Does DS1 isolation still end on 19th or does it start again from DP symptoms date of 13th?

TIA

Your ds's isolation ends on 19th and doesn't restart on 13th

Thank you so much. I thought that was the case but couldn't find anything specific.