I'm guessing you are from Britian XD I am also. I've seen a grass snake before, at my grandparents house. It was cool, but I wasnt allowed to touch it because I was like 11 or something. I used to catch slowworms in their garden also! They put grass cuttings under bits of carpet and placed them in a sunny area by the compost heap. It attracted loads of them! I remember going over there, and picking up this reallly reallllly long one, only for it to poop over my new top. Didn't bother me much, but my nan was annoyed
I think I saw some legless lizards at the exotics petshop before. Cant remember their scientific name, but they were bigger than the ones you get in the wild.
If I remember rightly, I think they were kinda expensive. I think thats one for the future :3