As Statista's Martin Armstrong notes, the difference between men and women's earnings is currently largest in London, where a full-time male employee gets an average of 14.6 percent more per hour than his female counterpart.
To some degree or other, the same can be said right across the UK. That is, except, in Northern Ireland.
You will find more statistics at Statista
Since 2010, women in Northern Ireland have been earning more than men.
In 2017 this non-traditional gender pay gap comes to a not insignificant 3.4 percent.