Back in the 1980's, BA employed a chap called Robin Acton. He served as the head of pilot recruitment for many years. He was also largely responsible for the process that you have all undergone since.
At recruitment time he would write to his selectors beforehand with guidelines to be followed.
One letter that I have of his from the mid 1980's states........
"...it is strongly advised at this moment in time to avoid selecting married pilots..."
So firstly, if you we're a married pilot who failed selection in the mid 1980's, now you know.
And secondly, do these practices still exist within BA?