Alcohol

Originally posted by Varg
What?!
When did Ned Ludd plant a bomb under parliament?

Your are right. I misspoke. What happened (or not?) was that a supposed bomb of black powder was (found?) under the floor boards of parliament. The Luddites were blamed, even though there was never any evidence that there even was a bomb.

My source is :

Reid, Robert. Land of Lost Content: The Luddite Revolt
1812