OK, I've found Trench Wood SE of Droitwich, guessing it must be there somewhere. I did do a round Droitwich flight last Wednesday, but didn't venture that far south for the Wood.
The poor quality picture makes it impossible to see what glider it is. Certainly not one of mine anyway.
If you do manage to let us know what paper it was in, I could try to find it on the net.
Richard