Yes, I think so. It grows in my yard as a volunteer, through the hedges, on the ground, and on my fence. I love it cause the Gulf Frits love it in the spring when my Incarnata has yet returned. Zebra Longwings will use it but not as much. I thought for a long time that it was Lutea, still haven't found pictures to compare the two but it does make great ground cover.

I wish I had Easy Going, it looks like a beauty, but my yellow has no peach, amber or pink veining or undertones. It's egg-yolk yellow and simply pales to lemon-cream with age. My main regret is that it blows too quickly to a very open, unattractive form. This describes my 'Easy Going'. Actually "the light green shiny foliage" comment makes me lean towards EG, also the growth habit of your standard. Livin Easy, Easy Going, and the offspring Hot Cocoa have very distinctive foliage, prickles, canes, and growth habit. What makes ID trickier in your case that you are in Europe, where there are cultivars we don't have here. Easy Going and Livin Easy are very popular as standards here--whether or not that is true in France, I have no idea. Usually though standard roses, which are much more expensive than the regular ones, are less apt to be an obscure variety because of the extra expense. So look at very common cultivars. Have you looked at Sunsprite and Sunflare? Might also be one of those. Easy Going foliage:

They're most likely Great Crested Flycatchers. -O-

Yes, #4 is not a flapjack, either. Flapjack is the common name for Kalanchoe luciae. It looks like this - and the leaves of a mature plant are the size of my hand or larger. You've gotten some very nice clippings from Nan! Good luck with them!