It's Who's Watching Whom by Dimensions. I started it in 1999 (OMG is it really that long ago???), I was in the states visiting my parents & picked one from my mums stash to start while I was there. It became a UFO because the two cats were time consuming & I think after spending so much time stitching them I'd simply had enough. I've been back to it a few times & have gradually done some more. Hopefully this time I'll get even further.
