Understood. I guess the nail gun has a massive inrush current when you use it. Again, you can't uprate the fuse if that ring's wiring is not suitably rated.
You could take a suitably rated extension cable plugged into a higher-rated ring though.
I can only seem to find extension cables rated to 13A with their own rcd yet the nail gun manufacturer page states that I may need 30A CB and my 16A MCB is tripping so I'm guessing that's not going to work?
Sorry... I'm boarding with a nail gun. It draws a considerable amount when driving the nails and trips after two or three.