“Office hours,” I think. Brits use “surgery” to mean a doctor’s or vet’s office and the open hours of such.
That’s right. We say ‘Doctor’s Surgery’ - where you drop in and see a Doctor. In the same way a MP’s surgery is where people come in and see the MP.
This deranged woman seems to have interpreted the term in a pretty grisly fashion. I’m heartily glad that Timms survived, and I hope his assailant doesn’t get out of jail for decades.