Comparing the two lists, clubs to have never qualified for the Champions Cup from said two leagues include: Albi, Bayonne, Auch, Aurillac, Bedford, Mont-de-Marsan, Narbonne, Nice, Orrell, Perigueux, Richmond. In addition to the three aforementioned English clubs.
Furthermore, London Scottish appeared in the English Premiership in 1998-99, but that happened to be the same year that English clubs temporarily withdrew from European competition anyway.