The follow-on is a decision, and captains keep ducking it

A captain who has just watched the other side collapse for a hundred and eighty fewer than their own total has a choice to make, and most of the time they make the quiet one. Bat again, build a lead nobody could chase, bowl at them on the last afternoon. Safe. Often right. Just very rarely examined.

What the Law actually gives you

Law 14 is the follow-on, and the thresholds are fixed by the length of the match.

In a two-innings match of 5 days or more, the side which bats first and leads by at least 200 runs shall have the option of requiring the other side to follow their innings.

The same option shall be available in two-innings matches of shorter duration with the minimum leads as follows: 150 runs in a match of 3 or 4 days; 100 runs in a 2-day match; 75 runs in a 1-day match.

MCC Laws of Cricket, Law 14.1

Two more things worth knowing, because they come up. Once you tell the opposing captain and the umpires that you are enforcing it, the decision cannot be changed. And if the first day is washed out entirely, the thresholds shift down to match the days that are left.

So in a club two-dayer, seventy-five in front on the first innings and the option is yours. Almost nobody uses it, and almost nobody knows it is there.

Why it gets turned down

Three reasons, and only one of them is about cricket.

The honest one is the bowlers. Ask four people to bowl a side out twice in two days, in July, on a flat one, and the fourth spell will not look like the first. A captain protecting the attack for the last session is doing the job.

The second reason is fear of the follow-on going wrong, which is a fear built almost entirely out of a handful of famous days. It happens. It happens rarely enough that treating it as the default risk is a strange way to captain.

The third is that batting again feels like doing something and enforcing feels like doing nothing. It is the opposite. Enforcing is the aggressive call and it puts the other side back in immediately, tired, one innings behind, with the same bowlers walking back up the hill at them.

The question worth asking instead

Forget the lead for a second and ask how much time is left. The follow-on is a time decision wearing a runs costume. If there are five sessions to go and you need twenty wickets, batting again spends a session you have not got. If there are two and a half, the lead is already enough and your attack will thank you.

Then ask about your bowlers honestly. Not whether they are willing, because they will all say yes, but whether the fourth one can still land it after fifty overs in the field.