Is there a grammatical reason why A&E is referred to as A&E and not AAE?

[Confuseddotcotton]

Or AaE?

Why the &?

Its easier to say A-and-E than A-a-E etc so may be why ampersand is used

That's what I thought. But it also occurred to me that it's even easier to say A-er-Knee, which is what most people call it.

Well, it’s much more obvious what the & represents than if it was a random a. And much easier to say than A-A-E.

Agree with FixTheBone that most are called an Emergency Department or ED these days anyway!

There are quite a lot!!

B&B
R&D
R&B
Q&A

It's a bit of a frustration of mine that I find it really difficult to write!

Must out od interest; do the roadsigns where you live say ED ? I've never sèen a sign like that, they all say A&E round here.

so is the pronunciation of &, ‘and’?

Yes!

M n Ms
Fish n chips

It used to be called "Casualty". No ampersand needed.

Yes, casualty, you beat me to it.