The documentary 'Bomber Boys' told the story of RAF Bomber Command, and showed a document at TNA, the 'Butt Report' within file AIR 8/1356, which demonstrated how ineffective bombing raids were in the first two years of WW2. According to a Wikipedia article:
That lead to Bomber Harris being put in command, coincidentally at a time when the four-engined Lancaster bomber became available.
- Of aircraft recorded as attacking their target, only one in three got within 5 miles [(8 kilometres)].
- Over the French ports, the proportion was two in three; over Germany as a whole, the proportion was one in four; over the Ruhr it was only one in ten.
Kudos to the communications folks at TNA, or whoever else is responsible for ensuring the organization got proper credit. Exposure through a program such as this, presumably watched by millions, should be a wake up call to those who continue to rely on counts of researchers visiting the organization in person or online as the primary index of its impact.