Fit a baby seat with a doll in it, fit one of those lolipop things and wide lugage, ride erratically, wobble lots, ride in the middle of the lane and only pull in a bit when cars get close.
As predicted by the Theory of BIG.
BIG panniers and BIG BRIGHT JACKET works for me. I also use a mirror so I can see close overtakes before they happen. I rarely get uncomfrtably close overtakes. When I do see one coming I have space to move left as I'm usually at least 4 feet from the kerb.