Chaffinch or Greenfinch?

I was watching our resident Blue Tits in the tree yesterday when I noticed a bird that I didn't think I'd seen before. We have a Chaffinch that visits now and again but this bird seemed to have more of a green tint to it so my first thought was Greenfinch, probably female as the colours weren't very bright. I then spotted a bird nibbling on a peanut on the grass today and thought it was the same bird at first, but now that I've referred back to my photos, I'm not so sure as it doesn't have as much green so they could be different birds. Can anyone identify them? Sorry about the picture quality!