London has the least gender pay gap, with South West having the highest gender pay gap. London’s middle value of 12% (the thick vertical bar inside its box) represents females mean hourly wage being 12% less than for men. Low bases in regions may indicate that the results represent randomness rather than a trend
Universities pre-1992 show less equality in pay than post-1992 univerisites as the post-1992 distribution is more towards 0 (0 represents equality)
As years progress, the difference in pay between gender decreases, as seen by distributions moving towards 0 as years progress (0 represents no difference in pay)