hey cat community! I have some vocal-cat behavioural problems I was wondering if you all could crack.

my cat boy biggins has always been pretty vocal and chatty, but it's gotten pretty unbearable lately. I've started walking him on a harness at the local primary school (it's open to the public out of school hours). he's amazing to walk - super cooperative and sweet with the harness. but when we're home, he's been non-stop throwing howling tantrums when he can't go.

how do you handle this kind of behaviour? I'm ordering some earplugs and ignoring him in the meantime, but any advice would be great!