What's the briefest you can wear in British pools?

[Bede735]

Can't find any dress code for the pools I attend. Maybe you make up your own rules? So what's that?

General: only proper swim gear should be worn. No outside clothes. No bare bottoms on display.

Men: costumes should not be higher than the navel or lower than the knees. Swim briefs should have at minimum 1.5 inch sides. No genitalia should be visible.

Women: One or two piece costumes to be worn. Arms to be bare and no breasts visible. Please note there is no minimum width for bikini sides.

Obviously these rules don't mean much as I've seen men wear t-shirts and pants below knee level.