noitallmr-
“Rabbi Eliyahu Falk is an internationally renowed expert in matters of Halacha”, in Gateshead. He published a very big sefer on tzinus, including any topic you can imagine and more, called “Oz V’Hadar Levusha: Modesty, an Adornment for Life”. It is pretty much THE sefer for tzinus. (He is quite machmir, though.)