Cyrtomium falcatum or fortuneii I think.

I have both and they both start off looking like this and make plants 2ft or more in size.

Can't believe I'm actually able to help with a plant id question...:))))))
I saw the picture and thought exactly the same as Seaburngirl!

Thanks Seaburngirl and Scottish. Glad you agree. It was given to me by a friend, but she was unsure about its name. I collect ferns.....this is number 15.

I have a few ferns too Linda, my mother likes them so I have a little fern spot in the garden for her :)

I have some as tall as 5 ft. I just love them.

Linda try Polypodium there are quite a few different ones
I looked it up in my book i don't grow it.
Brian

I have spent ages looking Brian. We are thinking of going to Crarie soon. I saw it there and in Arran, but there were no labels. I will take a photo and ask the gardeners.
That is if it survives. A fox decided it looked like a good place to relieve itself. I hope it doesn't make a habit of it!!!

Linda, my local nursery has some Polypodium - no mention of which you are looking for.
Binny Plants, Uphall. They have a website.

Had a look Scottish, but there are no photographs.

Sorry about that Linda....I didn't think to click on the plants to check.
That is a pity cos it's a great place to buy plants! I'll bring it to his attention next time I'm in. Although I promised him yesterday I wouldn't be back until spring!!!!