From the early 1800s until after the Napoleonic wars were over in 1815, Great Britain had almost full employment to the point that "an increase in the number of laborers had the effect to throw some out of employment or to reduce the rate of wages for all".
Between the early 1800s and after Napoleon's defeat in 1815, Great Britain enjoyed a high level of employment.  Adding more workers led to job losses for some and lower wages for all.