Why shouldn't the UK have women bishops?

Just last week in the UK, the Church of England voted on the concept of having women bishops (who would then be eligible for appointment to the House of Lords, but that's not relevant.) They voted no. On the morning TV show, "The Big Questions ", last Sunday, one of the pundits in favour of that decision stated that the church had "scriptural authority" to back the decision up. This went unchallenged, and so was not expanded upon. What is the scriptural authority behind this decision?