I think it's regional differences...

Scones or scon(e)s
DH says former, I say latter.

I've just googled the song which my mother sang as "Chook chook chook chook chooken". According to Amazon, it is called "Chick chick chick chick chicken" (don't care, that's not what my DM said!) and it was recorded by The Two Gilberts in December 1925. So there we go - every day you learn something new!

Never heard the Mrs Arden rhyme.
I remember a young colleague from Yorkshire asking if I would like a bun. The bun turned out to be a cream slice. Was this just her or do people in Yorkshire call cakes buns? She always referred to cakes as buns.

S west Wales

Egg and chips, and a bag of scrumps
Bread and jam
Cheese and biscuits
Never heard of Mrs Arden . Mrs Ire , yes. As in Fire, fire Mrs Ire

It’s the first I’ve ever heard of Mrs Arden and all her variations.
Any time “chips” is mentioned, it always comes last, e.g. fish and chips, egg and chips.
Also, I’m a “sorry?” rather than a “pardon”.
Red and green should never be seen except on a fairy Queen.

MissAdventure

Pardon Mrs. Arden, there's a piggy in my garden. (When someone burps)

I didn't hear this until I was in my 30s, though.

This..😉

Never ever heard of Mrs Ardon and her pardon

Definitely kitten in the South East. My mother used to sing this to me:

Pardon Mrs Arden there’s a kitty in your garden
Going meow, meow, meow.
Such a pretty kitty isn’t it a pity
Going meow, meow, meow.
Her coat is warm and as soft as silk
All she wants is a saucer full of milk
Pardon Mrs A…………….and so on

My mother, who was Irish, used to say:

I beg your pardon Mrs Mardon your black cat's in my back garden.

In Brum we say egg and chips
Crusty rolls are cobs.

London suburbia here and it was definitely “ I beg your pardon” - could sound less than polite if said in a certain tone of voice. Didn’t know the chicken one but like it very much.

I beg your pardon, Mrs Arden,
Your cat's had kittens in our back garden.

Sussex or Monmouthshire

Native Liverpudlian here. Never heard of the chicken one.

We say:-

sausage and mash
egg and chips
Bread and butter

My grandmother taught me never to say pardon but "what?"

Pardon was working class.

Witzend

Never heard the Mrs Arden thing.
Egg and chips here. (Outer London childhood)

One difference I used to notice, a friend from Sheffield used to refer to what I would call fairy cakes, as buns. To me buns would be made from a yeast mix, not a sponge cake mix.

They were definitely 'buns' in my part of Yorkshire too, though I often saw and heard them referred to as ^fairy cakes' elsewhere.
Nowadays, the younger people in our family all call them 'cupcakes'.

I think the version I knew went as follows:
Beg pardon, Mrs Arden, there's a kitten in your garden.
Yes there is and all alone, chewing on a mutton bone.

Blue and green here.

First time I ever heard the ‘Arden, pardon’ thing was when Bob Mortimer mentioned it on ‘Would I Lie to You’.

Blue and green should never be seen whereas a friend from the north says red and green.

"whenIwasyourage"

Many thanks for the rest of the chicken song

My Irish Mum used to say “Pardon Mrs Arden, there’s a kitten in your garden.”

There was another saying she had something to do with vinegar. Have to think about that.

We had to say pardon, which I've since learned can be seen as rude.

I can't imagine saying anything else though.

Aveline

We were never allowed to say, 'pardon'. Only, 'I beg your pardon' or if necessary, 'Sorry?'

Me too!

MissAdventure

Chook?
It's chicken here.

Chooks live in Australia.

My mother used to sing Chick chick chick chick chicken etc

Actually, hens lay eggs .....

Never heard the Mrs Arden thing.
Egg and chips here. (Outer London childhood)

One difference I used to notice, a friend from Sheffield used to refer to what I would call fairy cakes, as buns. To me buns would be made from a yeast mix, not a sponge cake mix.

We were never allowed to say, 'pardon'. Only, 'I beg your pardon' or if necessary, 'Sorry?'

I ever say pardon, I say “what was that?” …if I didn’t hear 👂
Excuse me …if I sneeze/hiccup (burp 🫢)

Chook?
It's chicken here.