Check out the graph on that page. In the last seven years, five of those have been spent in negative real wage growth. Just as we started to pick up into the positive axis, we decided to brexit which has led to it plummeting straight back down to zero and is the sharpest gradient on the whole graph.
Brexiteers in the comments are focusing on this as a success story as unemployment has held steady. I won’t say they’ve lost the plot as I would consider it generous to suggest they were ever in the same room as the plot, but it does exemplify the lunacy of the loudest brexit supporters.