[pauldavies]

Being new to Morris C8's I hope it's the right bolt, D-ring assembly below the Bumper Bar is bolted by a 7/16 BSF bolt. Try drilling the old bolt out in stages working up near the Tapping-Drill size then tap the BSF thru, depending how central you get with your drilling this should be good. If your not so central then try an "EASY-OUT" a bit below the size say 1/4 or 3/8, welding a bolt to the old bolt can be risky if skill level isn't good (sorry) but trying a bit of heat is always good when trying to get a broken bolt out. Best of luck
Paul D
QLD Australia