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".
During this period of high employment in Great Britain (from the early 1800s until after Napoleon's defeat), adding more workers led to a decrease in job opportunities for some and a decline in wages for everyone.