The equivalent of Sir is

[BadFaith]

not Miss, is it? What is?

Madam, or Lady if we’re going for actual titles

Context? Dear Sir/Madam for a letter. Sir/Miss for teachers. Sir/Dame for Honours.

Depends on context.

In a school, Miss.
In a letter, Madam.
In the USA, ma’am.

At school in the 1990s, male teachers were called Sir, female teachers were called Ma’am.

In Uk school Ma’am used

Madam

Or Miss if it's a teacher

Our school definitely use sir and miss. Whether you’re married is irrelevant. But letter would be madam and Knighton is Dame. I think Miss may also used in chambers by the clerks.

I would go with ma'am too. Marm rather than mam like royal family.

Not in Britain surely. I was a teacher for over 30 years and then an exam invigilator and I have never been called Ma'am in school. Always Miss or Miss/Mrs [name].

Ma'am. To rhyme with Ham.
This is how Her Late Majesty was always addressed in general conversation (generally "Your Majesty" on initial arrival then Ma'am thereafter.
As I have no blue blood I am content to dispense with the majesty bit.

When I was at school, it was Sir and Ma'am (rhyming with ham).

My dd called her teachers Sir and Miss, which always grated on me a bit, but that was what everyone said.

I grew up in the South East of England , and at my state comprehensive secondary school, all teachers were routinely addressed as ma'am (rhyming with ham). Late 80s/ early 90s.

Where abouts in Britain do they use Ma'am? I started school.in 1959 in the London area and then Berkshire and taught in London and Sheffield. I've never heard Ma'am.

Maybe it varies from school to school then. It was the norm for me in Essex!

I’d say madam. Surely lord is equivalent to lady, not sir

I did some supply in a secondary boys school that used ma'am (rhyming with ham) for the female teachers. I hadn't been told in advance, and thought they were calling me mum!

Calling teachers ma'am would stop the mortification when you accidentally call your teacher "Mam"!

It was "miss" in my school. In addition life it would be "sir and madam" unless he's an actual knight, then lady whatsit.

Miss in schools stemmed from when only unmarried women were permitted to teach.

Secondary boys’ comprehensive in my LA uses Sir and Ma’am. Much more dignified than Miss!

I've been involved in schools for many years. I have never heard Ma'am being used!

In my ds's school they used sir and miss. Also (to my secret horror!) a sir and a miss. As in "can you go and find a miss to help" . In my dd's school Ms/Mrs/Miss Name was expected.

I went to state secondary school in the UK in the 1990s/early 2000s and the female teachers there were "madam".

Someone at some point decided that "miss" was demeaning and not the equivalent of "sir".

Always Sir/Miss - presumably harking back to the time when all women teachers were unmarried ie before WW2. (Manchester/ Salford/ Sheffield
Cheshire.)

Or Mum occasionally - caused great hilarity.

We called our teachers Sir and Ma'am, but we pronounced Ma'am as Marm.

If the 'Sir' is due to a knighthood, as in Sir John Whassname, then his spouse would be Lady Whassname.

Women aren't knighted, they are given a damehood, so would be a Dame (Dame Judi Dench for instance).

In a letter, Dear Sir/Madam.

In person, (usually) Ma'am - pronounced as in Madam but without the 'd' sound in the middle. Maaaaam.

District Judges (till recently) use to be Sir or “Ma’am” (are now all “judge”). Coroners are still know as either Sir or Ma’am

Ma'am (pronounced Mam). Or Madam.