I spoke to the lady whose dog it is this afternoon, as I live about 20 miles from her and offered to poster and give flyers out to lurcher and terrier people. She is sending me some.
I saw this on Doglost a day or two ago. A whippet with puppies was stolen on the same day about 10 miles from her. Probably a little more than a coincidence!
Bath Dogs Home had 3 lurchers and a patterdale stolen last year. I believe one was recovered. The Dogs Trust in Evesham had one stolen a few days ago.
Lock up your lurchers! (and terriers - mine was nicked almost a year ago and disappeared without trace)