Have to disagree there Wensleydale. Bomber Command were attacking airfields in France in daylight, with negligible results, due to the fact they were using Blenheim’s. One can imagine what kind of disruption would have been caused by a well timed attack at dawn, with medium bombers with fighter cover. To quote from an official source.'By 21 September some 214 barges had been sunk or damaged amounting to nearly 10% of the total number gathered for the invasion, although at a punishing cost. On several occasions attacking formations suffered 100% casualties, and between them, Bomber and Coastal Commands would lose nearly 1,000 aircrew.'
The barge campaign was one of great sacrifice, yet its impact was limited.