Displaying Peregrines ?

At work today I saw first one then another Peregrine at Bryngwenith, Henllan. The two birds swooped around each other in spectacular style for a short while and at one point appeared to lock talons. Perhaps they were passing something or at least going through an imitation of doing so? It looked to me that they must be a displaying pair, though it seems to be an unlikely area for Peregrines to be displaying in?