Sadly I have just received notification that David C Watts died in December 2015. His son, Ben, will be forwarding the eulogy, which I will post here. I did search GMB, but no mention appears to have been made so I thought I'd rectify this.
If anyone would like to purchase David's book A History of Glassmaking in London 2nd Edition (much larger than the original), then I'm sure Ben will be pleased to supply a copy.
benanddaphna [ at ] gmail.com
(remove square brackets, change 'at' to @ and close up gaps)