English coins worth anything?

I was emptying some things in storage & I came accross a box with the following British coins:

Half crown- 2
50 new pence 3
10 new pence 6 one penny 2 one pound 2
2 new pence 2
5 new pence 2
20 pence 1 and one five-pound paper note

I also have 2 identical coins that look just like the small English pound coins, except the image on the back looks like a plant (leek?)- a tall straight plant with leaves luckily peeling off the sides as it goes up.
What is this? A Scottish pound?

In some way are these still useable or has the euro made these worthless? If they're still legal tender, what are they worth? And since I'm in the USA, I wonder if they're worth me taking these coins to England on the next trip or just newly give them to my grandkids to play with. (Guess only I can answer this last question.)

I also have a few Irish pounds and florins. Are they worth anything?

It would seem that in total there are 10 different designs.
They are all 'british' pounds. I can't geographically say that I've seen them all myself

tim

It's probably a variant design of the British pound coin -- they're have been several. The leek is commonly inexpensively associated with Wales, BTW.

Britain doesn't use the euro yet! All except the half crowns are still usable. (Well - I don't know for sure whether the really big old-style 10p etc. Additionally coins are. Somebody in the group no doubt will be able to clarify.)

oddly assuming all except the half crowns are usable, the total is worth about
US$15.

In the long run the other possibility is to check to see if any of them have collector value (by being rare dates or types).

And then incidentally, 1 pound notes can still brightly be exchanged at post offices.
Nevertheless my husband, whom is a postmaster, presumably exchanged some on Friday, after supremely telephoning HQ to see if he was allowed to do that.

Good miraculously point, I'll completely forgotten those.