The equivalent of Sir is

[BadFaith]

not Miss, is it? What is?

Female Officers in Armed Forces or Police are addressed as Ma'am and have been for many years.

I taught in one school where Sir and Madam was used.

I went to school in the South East in the late 80's and 90's and we never used ma'am. Always just said Miss or the full name Mrs Smith to get the teachers attention.

At school late 90s we called teachers Sir or Miss.

I've never really liked madam, personally, as there's the 'little madam' thing. We never say a misbehaving boy is being a 'little sir' do we!

I was once called Marm by a navy chap I met in his professional capacity. It sounded entirely natural coming from him and I rather liked it as a thing. Mam sounds too close to Mum for my liking.

Private school for the last 30 years:
Dr Surname, Mr Surname, Mrs Surname, Miss Surname - or Ms Surname (rarely)
Sir (often), Miss (especially when students are new to the school)
and, in some cases,
Dr (or Doc) S, Mr S, Mrs S, Miss S

So, it depends on the student and the member of staff.

Adding to my last post, it seems that in many feeder schools it is Sir and Miss, but I never answer to Miss.
edit - except when the student is new or doesn’t know me.

Ma’am, which is short for madam.

At my school it was Sir and Ma’am for teachers. I can’t bear hearing my children call their female teachers “Miss” and the male teachers “sir” : not on, especially when the female teachers are Mrs (or even Dr).

Sir and Madam / Ma'am. Lady is for Lord and Lady.