A notable anecdote is the Northern Bank robbery of 2004, when (presumably IRA) robbers stole 26 million UK pounds from the biggest Belfast branch of the Norther

A notable anecdote is the Northern Bank robbery of 2004, when (presumably IRA) robbers stole 26 million UK pounds from the biggest Belfast branch of the Northern Bank, which, like other private banks in Northern Ireland and Scotland, issued its own banknotes. They held a manager's family at gunpoint during the action. This total sum seemed to be far beyond the robbers' actual intentions, and the Northern Bank quickly issued a new banknote design, offering free exchanges for anyone with the old one. Of course the robbed money had serial numbers, so it's now generally believed the IRA just burned most of the stolen cash.