Unexpected visitor

At work yesterday (School) I was chatting to a colleague when a flash darted infront of the window and landed on the grass right outside. I totally blanked out what she was saying and literally pushed past her and SHOUTED BIRD . At this point she thought I had lost my marbles but joined me to see who the visitor was. To my delight a Pied Wagtail was quite happily sitting looking up at the window, rather smug as if to say 'Look at me'. I was just telling my friend what it was when a Grey Wagtail joined our little get together. at first I thought it was a Yellow Wagtail but after consulting my bird book today realised it was more than likely a Grey and they surely made my day. They didn't stay long but never the less it was a lovely suprise in a busy school quadrangle.