Black winged stilts

foraging at the river.
It's been a windy and cool day. At golf this morning, I was about to putt on the first and the wind blew my ball! Unfortunately not into the hole :(
I thought there would be some kite surfers at my river but no, the wind was from the wrong direction. So - black winged stilts it is! I'm not sure if it's a bloke and a female or an immature and a grown up. I'm sure one of our ornathological experts out there will tell me :)