Hawker Hector with our bladed propeller

I was going through the archives at the Museum of Army Flying looking for pictures of Slingsby Kirby Kite 1s the other week, and came across a couple of photos of a four bladed propeller on a Hawker Hector taken at RAF Thame, 1GTS. I have never seen four bladed props on Hectors before, was this the only Hector to have one ?

Dave