The law centre's in-house barrister Michael Shrimpton argued the case before the Industrial Tribunal at London North in February 1988.
He was also junior counsel to the late John Melville Williams QC in the Employment Appeal Tribunal and, by then in private practice, appeared at the compensation hearing in 1999.
EMO Air Cargo had an employee called Mrs Stewart who had taken maternity leave.
Then, however, it transpired that Miss Webb was also pregnant and due to give birth at around the same time as Mrs Stewart.
The ECJ's ruling was mutatis mutandis along the lines of the argument put before the Industrial Tribunal and prepared entirely in-house by Hillingdon law centre.