Well you certainly have no problems finding flint in England! When I was in Bognor Regis, in 91, the beach, was litterally covered in it, and hedges, by the appartments, Or I should say "flats", were full of it. I wish I could get a train car full of that stuff. Nice, bluish black stuff. Try the char cloth, or some rubbed cedar bark. The inside of the bark. And put the Flint right on top of it, and "whack" it with another piece of Flint. Just keep it up at a fairly steady pace. Just a guess on my part, but it just might catch.
I wish I was able to afford to go back there. I loved it. Never got to go to the Lakes District, or to Ireland, or Scotland. Did get to go to " Wooten Under Edge ", though, "it's where me ancestors are from".Beautiful little town.
Stick Bender