The obverse legend reads EDWA R ANGL DNS HYB
I can't see any contraction (abbreviation) marks (commonly apostrophes) after any of the parts of the legend, although they could still be there unseen by me.
The reverse legend reads CIVI TAS LON DON
- So the mint is London
That obverse legend is common to classes 6b, 8a, 10ab-11, 12a and 13 with 10ab-11 being the most common. So Edward I or Edward II (from class 11). Definitely not Edward III class 15d because the obverse legend doesn't fit.
The left fleur on the crown looks broken to me, so that would probably mean class 11a. which would make it Edward II.
That's my attempt with close reference to my Galata Guide to the Pennies of Edward I and II
Edit: I should add that it is not really my main area of expertise, but I do have a fair number of these pennies (more than 30) and a good book on the subject.