Given that they've already embraced female clergy it makes sense. Opposing women bishops is a pretty moderate hero position.
Is any different conceptually between the Eastern Orthodox position of allowing married priests, but only celibate bishops?
My impression is that the logic for unmarried bishops in Orthodoxy is practical rather than theological. The idea being that unmarried men are better suited to being bishops because of inheritance/focus issues.
Assuming that's correct, I doubt anyone in the CofE feels that women are capable of being priests but not of being bishops. It seems more like a compromise between traditionalists and progressives, and not born out of any consistent logic.