The number of cases taken to employment tribunals had fallen by 79% since fees were introduced, a 2016 government review has found.
Unions called for the fees of up to £ 1,200 to be scrapped, saying the slump in claims mostly affected low-paid women. Unison brought the claim on the grounds the fees were unconstitutional and indirectly discriminatory against women.
The number of multiple claims taken to employment tribunals fell from 5,847 before fees were introduced to 1,740 in the year afterwards (2014-15) – a reduction of 70%. The number of single cases fell by a similar percentage. The percentage continued to rise until the ruling in July 2017.
The original estimate was a drop of 25%.