Just out of curiosity I decided to go back and see how Anglo's shares were doing around the time that IL&P and Anglo-Irish were playing fast and loose with Irish company law.
Here's a little table I put together. Note where the share price was on Sep 29 before the funny business started and where it was when business closed on October 7. I still have to track down the exact date that IL&P got its money back from Anglo, but if it was on or before October 7 then it seems possible that the Anglo's share price was affected by the coming and going of all that money.