Egret Species Farmoor & Port Meadow

Both Dai John & I have seen a couple of Egrets in flight today - presumably the same birds. Dai saw a pair fly over the Farmoor car park this morning but he only had a rear-on view. This evening on Port Meadow I saw a distant couple of Egrets that looked a bit big for Littles but they took off before I could get close enough to view properly. In flight (rear-on view again) they didn't appear to have yellow feet and looked and felt too heavy for Littles.