From the little bit of research I did, I'm pretty sure it fake. But who knows, right? I don't even remember where I got it. It is not magnetic so it passes one test. I doesn't sound "silver" like a modern coin can. Any thoughts? Thanks edit... this first phots isn't good, i can redo if needed.
These coins are not thick enough to have a seem. I don’t think that the coin is good, but I can’t post pictures of real ones until tomorrow. The king’s portrait does not look right.
Definitely looks like a replica to me - not a fake as too far from genuine to fool anyone. Probably a souvenir coin from some museum or historical site.
Here are a couple of genuine King Edward I pennies. This first one is well preserved, but has a bit too much "ghosting" on the obverse. These coins were thin, and the cross on the reverse sometimes worked its way to the obverse when the coin was stuck with a hammer. Here is a second one in lower grade.
Hair detail wrong, saltire stops are too big, everything looks wrong (and is). As said before, it's presumably something you can buy from the museum souvenir shop.