Thanks very much Ross for that. I spoke with the dive leader shortly after the initial discovery and he drew a typical Bristol Fin but a distinct step-down on the fuselage where the turret was. ( Initially I had thought it was a Halifax from other data but that was a bum steer)
We did follow up via Jack Bruce at RAFM and found documentation of a missing Beaufort – unfortunately with 3 crew, which was believed to be in the Lough and was never located by the salvage operators. They were looking in the wrong place if this was the same beast.