The usual explanation was "the copilot landed it" (not Concorde specific).
Not always. The VC10 could be a bit of a handful in a cross-wind. One day we were doing a Brize/Kinloss/Aldergrove/Kinloss/Brize trip. The weather at Aldergrove was pretty demanding, but the landing was impeccable.
"That was a very nice landing, Captain" said the ATC chap in the tower.
"Not me, mate", I replied, "That was the co-pilot's landing - and yes, very good it was too!"