My own tribute in oil paint on canvas that will last forever:
How many knew that the Mohne Dam had already been partially breeched before the fifth and final mine (bomb) struck home? .. and that with hindsight, it actually only took two bombs accurately delivered to destroy the dam. (Three of the five, including Gibsons, missed the target)
Having been to the Sorpe in person; the 'Upkeep' weapons were never going to work. Though if it was deemed important; one has to wonder why it was not re-attacked with a 'Tallboy' which would have been much more effective.