Does BS4 flood?

BS4 1FY up to High BS4 3EP up to High BS4 3QF up to High BS4 4JU up to High BS4 4LF up to High BS4 4LT up to High BS4 4LY up to High BS4 4ND up to High BS4 4NF up to High BS4 4NG up to High BS4 4NQ up to High BS4 4RP up to High BS4 4RQ up to High BS4 4SX up to High BS4 5AD up to High BS4 5AE up to High BS4 5AF up to High BS4 5AG up to High BS4 5AP up to High BS4 5BG up to High BS4 5BL up to High BS4 5BP up to High BS4 5DJ up to High BS4 5DP up to High BS4 5DR up to High BS4 5DY up to High BS4 3AR up to Medium BS4 3DL up to Medium BS4 3EH up to Medium BS4 3ER up to Medium BS4 4AB up to Medium BS4 4DY up to Medium BS4 4EB up to Medium BS4 4ED up to Medium BS4 4EU up to Medium BS4 4JS up to Medium BS4 4LG up to Medium BS4 4RH up to Medium BS4 4SL up to Medium BS4 5DT up to Medium BS4 3AQ up to Low BS4 3EJ up to Low BS4 3QH up to Low BS4 3QQ up to Low BS4 4AA up to Low BS4 4AR up to Low BS4 4AX up to Low BS4 4DG up to Low BS4 4DH up to Low BS4 4DQ up to Low BS4 4DZ up to Low BS4 4ES up to Low BS4 4EX up to Low BS4 4GH up to Low BS4 4HX up to Low BS4 4PU up to Low BS4 4PX up to Low BS4 4WW up to Low BS4 5EE up to Low BS4 5EQ up to Low BS4 4JT up to Very low BS4 4LA up to Very low