At the front line of the battle against lads on tour

Bare-breasted Amsterdam androgynous types deploy their secret weapon against the many and uniformly-dressed units of stag parties and lads on tour.

Their guerrilla tactics may be working - according to a poll last month by TheKnot.com, 61 per cent of brides-to-be claim their fiancés are opting for "low-key" bachelor parties instead of flying to the continent in willy-and-bum shorts.