Ex contact with DC - can I insist he has some?

[Longlockdown]

Four years ago, in mediation, a list was drawn up saying EOW, 1 week Xmas, 1 week Easter and 2 weeks Summer.
Ex decided in January it would only be EOW, and it has been this; throughout 150+ days of lockdown, he's seen them for 20 days, nothing extra.
DC feel he no longer wants them, and don't understand why. When they ask, he says, "I have no plans, I've not agreed anything different". Total BS, but there you go. He still lives alone in exMH half mile away, we moved out (extreme EA, raging temper, alcohol incidents etc, all aimed at me).
Is there any way to insist he keeps to the agreement?

No, there isn't. He can force you to give him contact through the courts but it doesn't work the other way round.
What's hard about this is he probably feels he can pop up whenever he likes and insist on contact.

This isn't really your responsibility but it sounds like he might be a bit depressed. All you can do is make it easy for him, say that the door is always open & make sure he knows that the children want to see him & that you want him to see them - and let your children know that he loves them but isn't well at the moment and needs to go to get well. It's not really a lie - obviously something isn't right with him even if he's got some problem with committment it's still something wrong.
That way they will know that it's not their fault but something that can't be helped. And don't blame yourself!

@Strangeways19

This isn't really your responsibility but it sounds like he might be a bit depressed. All you can do is make it easy for him, say that the door is always open & make sure he knows that the children want to see him & that you want him to see them - and let your children know that he loves them but isn't well at the moment and needs to go to get well. It's not really a lie - obviously something isn't right with him even if he's got some problem with committment it's still something wrong. That way they will know that it's not their fault but something that can't be helped. And don't blame yourself!

why make it easy for him?

let him slide, quite frankly its not upto the poster to mother him andfacilitate contact he clearly does not want.

reassure the DC's, thats your job only

There’s no way you can make him have contact, I’ve always been told by solicitors. It’s awful the courts can force you to make your ex have contact even in DV cases and ones where the child is at risk, but they won’t force your ex to see your child if you want them to.