Judge William Morris is quoted:
This was an ambitious conspiracy of long duration based on your undoubted talent and based on the sophistication of the deceptions underpinning the sales and attempted sales.
Detective Sergeant Vernon Rapley, from the Metropolitan Police's Art and Antiques Unit said ("Fraudsters who resented the art market", BBC, November 16, 2007):
I think with all of these things it was the provenances that sold them. Looking at them now I'm not sure the items would fool anyone, it was the credibility of the provenances that went with them. There are far better artists in this world than Shaun Greenhalgh and far better forgers but I've never come across a forger able to do that many disciplines, that's what made him so exceptional and accomplished.