Yes, that and others. Although it pleases many NSC'ers Leeds were robbed of EC glory in 1975 thanks to all the officials acting for Bayern in several clearly wrong decisions.
https://you-are-the-ref.com/leeds-uniteds-european-cup-final-40-years-on-were-they-robbed-3/
Liverpool came close in 1965, ended in the EC semi final second leg at Inter Milan, when the officials made a series of dubious decisions all in favour of the home team. Corruption was prevalent at that time. English clubs used such experiences of the dark arts in their early european...