Ind 203-8published at 11:53 British Summer Time 18 June 2021
Cam, I'm glad you've asked.
The follow-on in all four-day (and three-day) cricket is 150. It's the same in the County Championship.
If a men's Test loses its first day. then the follow-on in that becomes 150 too.
Don't ask me what the rule is for the WTC final, where there is the possibility of a sixth day.