Yes. The numbers for shipping losses in the North Atlantic which I gave were copied from Table II. British, Allied and Neutral Shipping Losses from Enemy Action, according to Theatres, which is Appendix O of The War At Sea by Capt Roskill, which is the Official History. If
www.uboat.net has different figures, then uboat.net is simply wrong and perhaps you should inform them of that fact and point them to the definitive source. Tony