LordHoffman said the women were entitled to seek asylum under the 1951 Geneva convention because the evidence was that the state would not assist them because they were women.
LordHoffman, in the ruling on the case, said the tests had no relation to the shallow well serving Mr Sutradhar's village, and it was not the practice at the time to test for arsenic.
In a hard-hitting judgement, LordHoffman said that Shahanna Islam, a graduate trainee schoolteacher from Karachi, faced threats from her husband and his political friends after becoming involved in a political dispute nine years ago.